Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d930d14b84828aa…

MALICIOUS

PDF

91.7 KB Created: 2021-03-23 14:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3f6909f501df0c70986ae298e9df8e51 SHA-1: d45c0e56d4133297a1911babc583a94a76886ba6 SHA-256: 9d930d14b84828aaf82fb6e96b732165817c67c89b0cb1d4560f6ef7997f1737
186 Risk Score

Malware Insights

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

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 0.9988

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://kuzutuzo.ru/123?utm_term=bertolucci+the+conformist+review PDF link annotation
    • https://cdn.sqhk.co/tarozawowe/gchbzgh/fifijoniwixefado.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/hcfkwKS/fesab.pdfIn PDF document text
    • http://lorenbayi.com/70789890989vauib.pdfIn PDF document text
    • http://keto-s1.com/why_wont_my_treadmill_turn_onslgy7.pdfIn PDF document text
    • https://cdn.sqhk.co/vovusupa/wjqLheA/amazing_facts_about_the_human_body.pdfIn PDF document text
    • http://card2card-perevod24.site/37386705589rqafj.pdfIn PDF document text
    • http://itchia.space/bigo_live_app_download_apk_freew3y7c.pdfIn PDF document text
    • http://zoosalon.org/wavusimexuluzisimavovolev8kjg.pdfIn PDF document text
    • http://parralax.net/57939890985xycbx.pdfIn PDF document text
    • http://larts.digital/what_is_agile_process_in_software_engineeringpy0d1.pdfIn PDF document text
    • https://cdn.sqhk.co/tefebenum/jfgffhi/debotunolobetidemenamoki.pdfIn PDF document text
    • http://ogranicbio.fun/matematica_para_primer_grado_actividades2wici.pdfIn PDF document text
    • http://my-favshop.online/nimusag8dcs4.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/gehaYgj/roller_coaster_arcade_game.pdfIn PDF document text
    • http://stav-games.ru/download_faily_rider_mod_apk_versi_terbaru_20201w0nm.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://ec08fec6-e576-400d-8504-372613838d3c.filesusr.com/ugd/57e0ce_4ba5dfdb428d42a487e5b9336d45ef9d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/61297740351.pdfIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_9b724e5fe5d7423cad7f5a6b3b8eceeb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/00103f00-0b3d-4529-81d1-b5516ae2158b/sutega.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/kemisiwuzizibewex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cba6d41-4a5c-4315-9896-8781e2101203/57518369148.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/unfall_formel_2_anthoine_hubert_video.pdfIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_f8c24a2fdfc34404aa768686afcdc717.pdf?index=trueIn PDF document text
    • https://da89e6ec-52f9-4c28-8de8-447a2e923c0c.filesusr.com/ugd/5e5b2a_f475ca2cab1f4ac7a938f874d99c3ace.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABF 4996 bytes
SHA-256: f04801bb3b7ac0d1f7100212c5f13ec35baef4aac64c5bc43913d724d0d126e4
font_01_sfnt_off00012ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA2 11880 bytes
SHA-256: 9f7abb81f80ad47afec5abd8d0ee04cb248d2267ab509af8a106e54a6aaed23a
font_02_sfnt_off0001533c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1533C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3