Malicious PDF — malware analysis report

Static analysis result for SHA-256 64afb8726ba5ce4c…

MALICIOUS

PDF

92.9 KB Created: 2021-07-01 00:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4192e7dee5a523748cc62b33739130e0 SHA-1: f41a522b8e1493dafb6323fd01fb2eebe906643e SHA-256: 64afb8726ba5ce4ca1e3725faf71e214c7d6d321b556f88d4ce936266a5d453a
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other domains, indicative of a link farm or SEO poisoning attack. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to phishing or malware hosting sites. No scripts were extracted, but the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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 http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/49vfp40mi74hls6n47selhekb1/kavaturimetuputod.pdf In PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d502d7ab1d---kinepulatefotanatusofako.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/p4h54d4vk9p1lclb479beegag2/21704063503.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/lisibixidifimi.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/10425236934.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/c1b6a3694a40bb0b52125f89d6af35b9/xipojuvekoboxupumegu.pdfIn PDF document text
    • http://sierrahighalumni.com/clients/878712/File/9244034782.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/kizuj.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/47e10b27b98717b1957c77c3029f7400/pipoxakogufamugadavelivek.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eebe9377af---vilafi.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/mimedo.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/b2e1dfe6fc06f938d03bbeb6fb56f53a/83938170065.pdfIn PDF document text
    • http://msiutilities.biz/documents/wujujojujikerarob.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/dcfed0330c75c5d45b3485f250237905/31889349120.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b1677959800---xenukegivupakesa.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/5b8mmt558sokk4l8mm3lq2f4r6/mumolomuzofoxoki.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/jelud.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071afa5f0eb3---62067228041.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc9f1169b5---65803128645.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/23339148484.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609532d8b67d0---safikuvekukuxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=sql+query+interview+questions+with+answersPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/2843727039.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10704 10792 bytes
SHA-256: 177f49db291782ddab3308b8e0eace1124c2052a60cddeca7febfa898637d200
font_01_sfnt_off00011fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE6 17636 bytes
SHA-256: aa821a3da4a716954fca90f4dcc473d1404a030ac9ab9a5c2a2e3943b4418e6e
font_02_sfnt_off00014e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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