Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc7ed131f32e3d1a…

MALICIOUS

PDF

78.2 KB Created: 2021-04-16 12:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b3b4854d033b8a2612f0e633d7ed484c SHA-1: 943a554313b66b2d12af56b1ad8abde2eae7aa4c SHA-256: cc7ed131f32e3d1aa844e726f503f25be01a8bf56378de4d6c9cfe3013d0f503
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 0.9997

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://jottigo.ru/strik?utm_term=how+does+direct+deposit+look+on+bank+statement PDF link annotation
    • https://cdn.sqhk.co/nejisakatok/hjRbiiP/crush_meaning_in_telugu_related_to_love.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/hiiXJgg/catfish_fish_tank_algae_eater.pdfIn PDF document text
    • http://zedanipon.iblogger.org/balasaraswati_her_art_and_life.pdfIn PDF document text
    • http://ketupepid.22web.org/51607118884.pdfIn PDF document text
    • http://kefutegi.iblogger.org/31444768396.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lujuxug.epizy.com/best_reader_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/how_to_use_actron_code_scanner_cp9001.pdfIn PDF document text
    • http://wazikaje.rf.gd/blauj_dizain_photo.pdfIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_b6d52cf965d445008f4fcfb1f6bcc2bc.pdf?index=trueIn PDF document text
    • http://lodafudamisov.epizy.com/sakanuxidub.pdfIn PDF document text
    • http://wadokeg.epizy.com/al_quran_terjemahan_indonesia_free.pdfIn PDF document text
    • http://nijesawojate.epizy.com/75600969301.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/lesap.pdfIn PDF document text
    • http://xozelabudizi.epizy.com/annabelle_1_hd_movie_in_tamil.pdfIn PDF document text
    • http://jixojeripe.rf.gd/24902832374.pdfIn PDF document text
    • http://jaforafonox.rf.gd/color_street_halloween_guessing_game_answers.pdfIn PDF document text
    • https://25f35837-e8ad-4357-b490-8f69bec4165a.filesusr.com/ugd/96c61c_4f82166178c1426fb19f80c8122a2e72.pdf?index=trueIn PDF document text
    • http://bulufuw.rf.gd/aterrizaje_en_la_luna.pdfIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_b8385dcd1ea5456da416e73476476437.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/rekanavalu.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_800bcd4e1753462fa273cd67eaebe266.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_off0000f39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39C 5476 bytes
SHA-256: 7d0007707d1b6501e18f0449d385e42941b1b751c6fcec138205e596e3dbcd0a
font_01_sfnt_off00010631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10631 10752 bytes
SHA-256: 877bae8dbe1116933f842be8c188cec33bc468d92f23c89743fe06f5c0567a46

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