Malicious PDF — malware analysis report

Static analysis result for SHA-256 3254c85322341587…

MALICIOUS

PDF

83.8 KB Created: 2021-05-09 19:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a30983d72259811993ecde410572be65 SHA-1: 1817fb5201bad839017fbe9ede185b3c4beaa3e6 SHA-256: 3254c8532234158747a2fab81aaaa24acc593c29d82f0b43de1c95bb80ec90c6
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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=tascam+388+for+sale+2019 PDF link annotation
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/54fc2b3c89eda5.pdfIn PDF document text
    • https://cdn.sqhk.co/tifisizeliz/iPxgiFB/54964310081.pdfIn PDF document text
    • https://cdn.sqhk.co/tipesewete/idA8BzO/charm_city_kings_release_date_us.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/hfajeRh/50441352990.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/ghAhcWF/kodubugidirorusivovojox.pdfIn PDF document text
    • https://cdn.sqhk.co/dodalowogiv/cfjwAHu/paludireximiji.pdfIn PDF document text
    • https://dapalijika.weebly.com/uploads/1/3/0/7/130738969/dilesululewabep-mopiz.pdfIn PDF document text
    • https://wegujelad.weebly.com/uploads/1/3/0/8/130813898/9521c0048ddb6.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/jgidsga/burger_time_menu_sioux_falls.pdfIn PDF document text
    • https://cdn.sqhk.co/vexapalas/nNhj4jh/caravan_palace_miracle.pdfIn PDF document text
    • https://cdn.sqhk.co/vekepafate/ciijjuV/14170538665.pdfIn PDF document text
    • https://cdn.sqhk.co/kegimovotol/hdijhge/80953682444.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_87327f88ce0446789abe146299218513.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/libros_apocrifos_del_antiguo_testamento.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/25776190103.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/vamefeg.pdfIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_a82aa4985271413783c5f6834fd1493c.pdf?index=trueIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_dac9e303dbb84b029b177b578904d2a2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lebaxa/26191509322.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_off0000f7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A3 4024 bytes
SHA-256: de64675b9333be3494a22a5d4d5b4a8b29f7eaf08e829d5c6cb53db2dbbaba2d
font_01_sfnt_off000105cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CF 5816 bytes
SHA-256: f22faa5e77d2872f6aa131709b8f1abc4fff0ed8c3408f618ff72d6433521d89
font_02_sfnt_off0001197d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197D 11816 bytes
SHA-256: f71afadc476cd9cf422ab133fd0ec37ce9b17adbd52731c029f3daf5f3473b78

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