Malicious PDF — malware analysis report

Static analysis result for SHA-256 035b763ed1e03940…

MALICIOUS

PDF

73.2 KB Created: 2021-04-01 00:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 57f437d86e814ed4e1534ed69bc6ae41 SHA-1: 98c1ede711eae24cb5dab94b840d3ad703dbfecb SHA-256: 035b763ed1e03940d6c70ecd6a688d06c5ff3328d0b3ffb5519b6a2b9248622f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://ponafet.ru/strik?utm_term=taco+bell+nutrition+facts+cheese+quesadilla PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477164/normal_5fd69b819c798.pdfIn PDF document text
    • https://cdn.sqhk.co/raninogozo/gjgaDij/waze_gps_app_review.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwasazafu/wBZJ0ig/29163577558.pdfIn PDF document text
    • http://didazema.mypressonline.com/lafavusaxenegusikavizowuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421464/normal_605510c8b2f8e.pdfIn PDF document text
    • http://drovazvenigorod.ru/7052598708a6mx5.pdfIn PDF document text
    • http://ipoteka.net/43252854409nr82h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378834/normal_5fca841ff27ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_604433b53ff82.pdfIn PDF document text
    • http://igcopyrightforhelps.com/how_do_you_cook_a_ham_in_a_roaster_ovend04ai.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/how_to_learn_animation_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/joziroluxu/rgetQUA/latest_nigerian_gospel_songs_june_2020.pdfIn PDF document text
    • http://karaulovlife.site/sederubtym0o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465125/normal_5fc5f829ad641.pdfIn PDF document text
    • https://cdn.sqhk.co/jodanonot/lvcmyev/diremasamavejugiv.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/a4ji5jg/52120203507.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/maytag_maxima_front_load_dryer_belt_replacement.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
    • https://uploads.strikinglycdn.com/files/68ef5f61-8e86-4fed-a141-d4c735f4eff1/digital_marketing_manager_salary_indianapolis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3249d9-f22f-4d43-876a-d34de75b02e8/how_to_tie_mens_tie.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://scripts.sil.org/OFLIn 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_off0000d21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21E 5204 bytes
SHA-256: 6f914c52fcf548e49f553e50d621a1cfbe63ec203ffb26d4b9a3468dc3ace2e1
font_01_sfnt_off0000e3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B8 11000 bytes
SHA-256: 25b434b4368fc19f0e0413de1ac2a4e7e27345d8a878e04658eb86d9e2613875
font_02_sfnt_off000108fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FA 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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