Malicious PDF — malware analysis report

Static analysis result for SHA-256 a070f97461dd21d4…

MALICIOUS

PDF

120.9 KB Created: 2021-03-21 22:28:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 210835d459aa39c076e1a392f1b33ff5 SHA-1: 997edc77d763f7e97d757f78373ded411307fb4c SHA-256: a070f97461dd21d4637c5be93d977795b71ebfd744e67289f3c94a2fad4f70e7
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://fokemale.ru/wix?keyword=structure+of+the+constitution+of+zambia PDF link annotation
    • http://profaudit32.ru/790550257007s632.pdfIn PDF document text
    • http://smartycredit.info/bulova_precisionist_movement8pnz0.pdfIn PDF document text
    • http://meblik.su/96712323644z91go.pdfIn PDF document text
    • https://bawilizutiv.weebly.com/uploads/1/3/4/4/134477944/ririwunutam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_602034f5299b5.pdfIn PDF document text
    • http://newyearshop.site/guwoxinusakanijasuboemj7.pdfIn PDF document text
    • http://reduslimitalia.site/is_black_ice_shield_outbux5d.pdfIn PDF document text
    • https://dogaralezuj.weebly.com/uploads/1/3/1/6/131637140/ec6fbcfc51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467975/normal_60314b5721ce0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_6021c3ba98ac9.pdfIn PDF document text
    • https://madapupe.weebly.com/uploads/1/3/4/6/134667506/1779092.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/firudegix/dobabofepoxunufanadufev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9152f957-b694-49f2-a27a-525be1796714/how_to_merge_layers_in_gimp_2.10.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/putareruvujitifoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6393a91-781b-4947-a096-48792b56a223/the_secret_life_of_the_american_teenager_cast_ages.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/gabeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c3615e-b00c-41e6-abba-6cee959ee32b/countable_and_uncountable_nouns_quantifiers_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/posapukajasokil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/234d1b5e-e369-4b98-90ae-7d59862548a5/sex_and_the_city_cast_season_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e262357-a40c-45ba-baa4-38ec3e597cb7/dark_phoenix_2_release_date.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F38 5380 bytes
SHA-256: 4a4bc3993eb9c5bbabd347d75b7e5a319b86aa772e60c6ebf0e4ff8c33e81149
font_01_sfnt_off0001b164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B164 10620 bytes
SHA-256: b027d49ae4e7ebd91fda3727ca1c76bb96f3d7aa277a2140aa5aa2285a7fc626

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