Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3faf7d77313900…

MALICIOUS

PDF

73.5 KB Created: 2021-02-26 06:04:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 63aefd657c91e2eca1e691017893b1cd SHA-1: 53a1674787e5af69e640af07dec7f9d4d074ca51 SHA-256: 6c3faf7d7731390047f69ac2c4790de86e273997e448446e33b7e4fba1e353b0
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-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://crophysi.ru/wix?keyword=dog+breed+group+quiz PDF link annotation
    • https://begakidiwadagav.weebly.com/uploads/1/3/1/3/131397934/kojez-bolawironuvew-dawevoxenome.pdfIn PDF document text
    • https://lopuxewununoj.weebly.com/uploads/1/3/4/7/134748711/6355809.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/PZhhnyQ/xatexozenapukoferi.pdfIn PDF document text
    • http://reform-st.ru/todibineniplhr5c.pdfIn PDF document text
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/fcd567111de.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/5_nights_at_freddys_game_free_play_no_downloadxupir.pdfIn PDF document text
    • https://rubusabulolow.weebly.com/uploads/1/3/5/3/135326577/1880827fb208.pdfIn PDF document text
    • https://welerenumabo.weebly.com/uploads/1/3/4/4/134467224/987f62633.pdfIn PDF document text
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/b8405dbf437.pdfIn PDF document text
    • https://gegixigozazewit.weebly.com/uploads/1/3/4/8/134858275/jotazopu.pdfIn PDF document text
    • https://kibodoru.weebly.com/uploads/1/3/2/6/132695707/2189496.pdfIn PDF document text
    • https://pudewufaziv.weebly.com/uploads/1/3/0/7/130739775/f430fc3.pdfIn PDF document text
    • https://gegiritofizupog.weebly.com/uploads/1/3/4/6/134644009/4c73db.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/gcwifOw/piririrepovafekaji.pdfIn PDF document text
    • https://cdn.sqhk.co/velujuvaxal/3KieJLf/playstation_experience_2020_fecha.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/gaxuremewuger/jepigumi.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/check_your_credit_report.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_off0000e44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44C 5020 bytes
SHA-256: ee6e51fe009666439ed463a86f23bb2a447ff551c2bfed1e1204b694695ce36f
font_01_sfnt_off0000f56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56B 10520 bytes
SHA-256: dab042483a0b8206c7ff7a2caee4f5e369a4182e3605ef791d5a7bbeff53b815

Open this report in the interactive analyzer, or submit your own file for analysis.