Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab155cf31ccd1a1…

MALICIOUS

PDF

81.2 KB Created: 2021-02-17 03:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: aa3ef3d74d2ca31655a441f3c5b8cd22 SHA-1: 997802ea3b8d89f8703bae8ca2dc92c8f2ea06ef SHA-256: 9ab155cf31ccd1a18106bae1939a8ae76590a48a290cb1601604476c7276bc05
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://baarspo.ru/123?utm_term=technical+analysis+stock+software+free PDF link annotation
    • https://cdn.sqhk.co/tivinarafuvu/czgiVgc/metal_slug_6_pc_game.pdfIn PDF document text
    • https://voranafirodibug.weebly.com/uploads/1/3/2/6/132696030/9308008.pdfIn PDF document text
    • https://mipapipav.weebly.com/uploads/1/3/4/0/134012398/8885687.pdfIn PDF document text
    • https://cdn.sqhk.co/nigalasiline/dhhkaii/small_business_plan_outline_example.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopijaku/5fgiiaa/46685554014.pdfIn PDF document text
    • https://buzoxebujodi.weebly.com/uploads/1/3/5/9/135971705/fevepibukemew-woxelezenot-kapavijadaxo-limirafajimosol.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/bSZhaA8/18015724182.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/iZzNahf/free_dating_sites_in_canada_only.pdfIn PDF document text
    • https://tegedibinatamam.weebly.com/uploads/1/3/5/3/135350324/sidosux_fopuna.pdfIn PDF document text
    • https://cdn.sqhk.co/jefigujaxev/MEjdTgj/jilivibulasajajalolizabu.pdfIn PDF document text
    • https://xowuxuwakewobi.weebly.com/uploads/1/3/4/8/134853014/5949080.pdfIn PDF document text
    • https://tivagirususu.weebly.com/uploads/1/3/5/3/135350390/dogadebelaneful_pidivo_wumevunuja.pdfIn PDF document text
    • https://mopebewugo.weebly.com/uploads/1/3/0/7/130776026/9122cbebc.pdfIn PDF document text
    • https://cdn.sqhk.co/tatudawo/eggiije/magic_snake_cube_instruction_ball.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
    • http://wamebebubo.rf.gd/fomanolijibeta.pdfIn PDF document text
    • http://tuxefovibipudun.epizy.com/blanchard_macroeconomics_7th_edition.pdfIn PDF document text
    • http://gevosumol.epizy.com/94016083910.pdfIn PDF document text
    • http://fekalalorupip.rf.gd/70343528687.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_off0000f0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0ED 4964 bytes
SHA-256: 24092ea6fda8a13a5f616d915c9d243bc7479d0896aca9e6f563281a9157cad3
font_01_sfnt_off000101d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D2 12032 bytes
SHA-256: 5ef1026bd36865ffc7495c9482f6ffdafd94a2da52466b818a75cb601c0ea148
font_02_sfnt_off00012946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12946 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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