Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ca894c6ae3ae0d…

MALICIOUS

PDF

120.0 KB Created: 2021-07-03 19:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 4fc63decf18404ae993de2743c0a5b8b SHA-1: 59de69e44b0fcf4dbf46178123b736f44a8f054b SHA-256: 95ca894c6ae3ae0dfc2a0c0d2c077bfda6531660e5f9fc64f2600cbf9397098c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9697

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/5500fb7dac16109acb9356f35838a8f7/2087513957.pdf In PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc80dc83ce---jokewivivilet.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c2581762a---punaturokowegubafu.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c86c6be77aa---tefigiteriwazekiju.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e39139351---moromadunuje.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/tawawup.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af594ec39a---gaderaxoninanilafi.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/12736ac63c8d0e30906f737ba6a04dea/19621282815.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fefdb9521---kovitali.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/jalipozezaxemuki.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/75690403952.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607193802f362---dititasixekikurixigi.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/95009131396.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/54646446493.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/41dad3b2b0ef45fb331e1b30b2c25b77/sogizugujisiwovusisufenel.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/65974464579.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608fee46182b1---13241515102.pdfIn PDF document text
    • http://tfforming.ru/d/files/dogirib.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/74b4b42652f4834392dfb9741563c0b4/pajitasufujapuv.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdccd0d98ca---tapalerowexetibazifor.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079158bcab99---26496466429.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c1a1cc259---33018976320.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607610edb7531---koxoxadapaduw.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210604_180351.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/suganogotogamufuzuvuzanal.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/rezara.pdfIn PDF document text
    • http://biosite.ru/images/news/file/goderaragubitedutanupi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=roblox+gift+card+codes+2020+unused+mayPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000156df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EF6 11560 bytes
SHA-256: 66764357cac262dd70265b35a1ab9354afe4da58eabf012c4e5edb0687e46356
font_02_sfnt_off00018a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A4B 16436 bytes
SHA-256: 89ac75fa497c1a9d8fc39286e29a5b0237fa0e61d5c5902e3e2eaa1b13c59e6b
font_03_sfnt_off0001a0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0E6 18456 bytes
SHA-256: ad279f0beed1b5fae037c5ba585eaaeb56daae8333e0a76bf8f70b5707c2e89d