Malicious PDF — malware analysis report

Static analysis result for SHA-256 0edfc6a683c23949…

MALICIOUS

PDF

85.0 KB Created: 2021-09-01 19:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 81b47d0d32adb48d42f17ac473b94909 SHA-1: 924b9cd0ad353a74ca18d84d759b20009e7896db SHA-256: 0edfc6a683c23949708cbb7acd6be90870bd841af5947d15f5873f2239b14957
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://systematix.pl/userfiles/file/56963612193.pdf In PDF document text
    • http://x04ydivan.ru/userfiles/file/55667308727.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f33a39bd8ba---pomiwuravoralazowomekekad.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/sunageki.pdfIn PDF document text
    • https://giaynangchieucao.com/userfiles/file/jakokesedifofatax.pdfIn PDF document text
    • https://bamor.org/userfiles/file/82011270509.pdfIn PDF document text
    • http://fittbikese.hu/files/file/xunutikojavugejal.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/bae0391db94a878a1eb6e555ed38ce85/tiwotiwuwobidaridenuzik.pdfIn PDF document text
    • http://hibertek.com/image/files/20210630_051841.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/51678744278.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/tafev.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/kkfsj8207tp2rh9a7icieirjae/jirum.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813ef740ba3---83184166421.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/48104787505.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fb5eaf973---22417134782.pdfIn PDF document text
    • http://niktid.ru/userfiles/file/notadoviv.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/66f29569d599e430b30ab862aa473573/93038617272.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/zexarukiguwepu.pdfIn PDF document text
    • https://egf.tw/test2/images/file/tezusevovasugatefana.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121a442b77ac---mapesexubut.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/3vrd7alvb5sfmf785r12m7tjv6/niwevanatu.pdfIn PDF document text
    • https://efnnma.org/files/file/tezuxiwosaxozi.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/lipobubafumubedokuxorus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=lord+hear+my+cry+versePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7E 18220 bytes
SHA-256: 92b989ab9a5438d9a645094a0e148ca4a0a267e06982b7069f62dca48fd8b9dc
font_02_sfnt_off00012e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9C 10432 bytes
SHA-256: 2b2c5935a6a3cc38d2f98afcf74796b6124fddd751b9c3b1206932928611e423

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