Malicious PDF — malware analysis report

Static analysis result for SHA-256 d847ed933ceb96f6…

MALICIOUS

PDF

97.7 KB Created: 2021-03-13 23:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: df590b969f4b844836cb3f22436202c6 SHA-1: 5d463a226b49b08a79bf4e1891d789ca7ea97208 SHA-256: d847ed933ceb96f6f8032ceb98fc3dc1b020144abc55744bb8a9773227bd51f1
126 Risk Score

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 0.9995

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://resalured.ru/wix?keyword=snowman+christmas+tree+decorations PDF link annotation
    • http://vuvodagedene.scienceontheweb.net/88599216525.pdfIn PDF document text
    • http://xagixowedobosab.medianewsonline.com/what_is_william_faulkners_nobel_prize_speech_about.pdfIn PDF document text
    • https://wetejitaxazis.weebly.com/uploads/1/3/4/3/134306742/makakum.pdfIn PDF document text
    • http://italywow.pro/how_to_replace_range_hood_bulbep84r.pdfIn PDF document text
    • http://mydenverneighborhoods.com/final_fantasy_crystal_chronicles_walkthrough_gamecubedyq0k.pdfIn PDF document text
    • http://getchambre.xyz/75457958266pn0pj.pdfIn PDF document text
    • http://smilex.club/2400487473518wzh.pdfIn PDF document text
    • http://jakor.pro/wozezoboxot8zcse.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/15135481687.pdfIn PDF document text
    • http://netewe5.xyz/gajetixitazejewofu4wu7r.pdfIn PDF document text
    • http://libertinemodels.com/personal_development_plan_for_workn6owv.pdfIn PDF document text
    • https://wokozizexufam.weebly.com/uploads/1/3/4/2/134234926/fibekesafotalet.pdfIn PDF document text
    • https://muwegejise.weebly.com/uploads/1/3/4/2/134265646/782fd46845f502f.pdfIn PDF document text
    • http://avto-trokot.xyz/predator_2000_inverter_generator_manualakrne.pdfIn PDF document text
    • https://sogatawinasefe.weebly.com/uploads/1/3/4/3/134327891/91fd685017.pdfIn PDF document text
    • http://icub.tech/dolls_house_directors_chairn0tpd.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/kotodur/the_crown_season_2.pdfIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_3bdc820af5d54248a5099cebacae264c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/76581737306.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/24509141712.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/royal_mail_envelope_size_template.pdfIn PDF document text
    • http://velelakolifuvu.onlinewebshop.net/what_is_iyengar_yoga_uk.pdfIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_7145d17a49844f9ebd48a030fa3abdf2.pdf?index=trueIn 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_off00014214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14214 5344 bytes
SHA-256: 4a81c952aedfb8672d5e983612065dd013eb06be90850a2d396eadfeda06d6b7
font_01_sfnt_off0001541b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1541B 11068 bytes
SHA-256: ee02f69e55321861a3f4ec41ba3bd88112c2379ba8705b710de454d1d913ea45

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