Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffdea2cef7e1c1e0…

MALICIOUS

PDF

75.8 KB Created: 2021-03-16 02:14:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 54dd391786a0454f8012ef29b838bbf8 SHA-1: 8573ba41f70357e47b66fc4dced2e942905bf9de SHA-256: ffdea2cef7e1c1e020604aee93985227b798d4773583703281335f81b90e2c4a
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many pointing to disposable hosting services, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=schoolboy+q+merch+crash+talk PDF link annotation
    • https://cdn.sqhk.co/busumodofu/lheiaMo/ace_money_transfer_rate_to_nigeria.pdfIn PDF document text
    • https://vadewowiruku.weebly.com/uploads/1/3/1/3/131382700/fodanijerilo.pdfIn PDF document text
    • http://inertbhjbj.ru/how_to_complete_3500_calories_a_dayuvhts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385633/normal_601d7d4f2a75e.pdfIn PDF document text
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/135dc78e38.pdfIn PDF document text
    • http://reznitskygallery.com/briggs__stratton_pressure_washer_pump_saver_directionslk49a.pdfIn PDF document text
    • https://cdn.sqhk.co/sadinuko/6Uijibe/20883982587.pdfIn PDF document text
    • https://venevivoxeda.weebly.com/uploads/1/3/1/8/131857756/zufuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_6020756997f41.pdfIn PDF document text
    • https://dataremidesop.weebly.com/uploads/1/3/4/6/134697992/nisojafeta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410459/normal_6040f199152c0.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/c8dA2hj/cleveland_browns_nick_chubb_news.pdfIn PDF document text
    • https://gaxasexafarud.weebly.com/uploads/1/3/4/5/134590452/ce305be2cc8.pdfIn PDF document text
    • https://dutilugamon.weebly.com/uploads/1/3/5/3/135301630/vudenexiza-xizaruwijore-jilosateb.pdfIn PDF document text
    • https://jewukezi.weebly.com/uploads/1/3/0/9/130970006/girozupabivof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446390/normal_603e877b6286c.pdfIn PDF document text
    • https://cdn.sqhk.co/gejixoneku/iage5wc/gifuteziselo.pdfIn PDF document text
    • https://cdn.sqhk.co/nenafodud/heq8giY/kepogogozobav.pdfIn PDF document text
    • https://cdn.sqhk.co/belesobikezi/hax65gj/delegation_of_financial_power_rules_2006.pdfIn PDF document text
    • https://cdn.sqhk.co/wubofuse/mlMgcha/97335031240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455387/normal_5fd8f59785320.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/aXvheic/ultimate_panther_simulator_free_download.pdfIn PDF document text
    • https://depemazijibibo.weebly.com/uploads/1/3/4/8/134846300/4225407.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E8 5208 bytes
SHA-256: 450365b0d7678e7147e353646f9ac8aa3d33b8eec9a88b9e59dd74aae69aca1b
font_01_sfnt_off0000eb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9A 11896 bytes
SHA-256: b0feb497dfb2f4fbefad84359cafdd3ee47bd757d1a22ce4efef0ddca0da1f88
font_02_sfnt_off00011411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11411 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c