Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab6be6b82d7cd3a…

MALICIOUS

PDF

72.0 KB Created: 2021-03-28 17:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7bbe65c94a821979f83fb96dfe87f6bc SHA-1: 1d4c2024e07b98f2db1b461d73b042dd74bddecd SHA-256: 3ab6be6b82d7cd3aaade76d12f3712dd32ae05557772a60f4b54251af5dd61b4
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/123?utm_term=worksheet+on+possessive+nouns+for+class+5 PDF link annotation
    • https://lugigotaxur.weebly.com/uploads/1/3/0/9/130969655/mepidekenavo.pdfIn PDF document text
    • https://cdn.sqhk.co/foxuninulini/gNhfF4o/modern_sofa_sleeper.pdfIn PDF document text
    • https://narodejezagog.weebly.com/uploads/1/3/3/9/133988416/mikosiguluda.pdfIn PDF document text
    • https://cdn.sqhk.co/pawexedibib/CtYgjhb/green_heron_lifespan.pdfIn PDF document text
    • https://fomutifimo.weebly.com/uploads/1/3/4/5/134594787/7e63f0f1c819a1.pdfIn PDF document text
    • https://diwimiwiwomenen.weebly.com/uploads/1/3/0/9/130969795/raxidaxuletireget.pdfIn PDF document text
    • https://vudunige.weebly.com/uploads/1/3/5/9/135981242/129987.pdfIn PDF document text
    • https://kibewibur.weebly.com/uploads/1/3/1/8/131856655/fomepijisazezasutoze.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/tZjhggG/sagiwaxosasirugud.pdfIn PDF document text
    • https://cdn.sqhk.co/tavevalurov/HprjaJ1/puzzle_bobble_universe_3ds_cia_download.pdfIn PDF document text
    • https://molisepav.weebly.com/uploads/1/3/5/3/135347716/bosepo.pdfIn PDF document text
    • https://nakofasojerurog.weebly.com/uploads/1/3/4/5/134592478/futamazodaz-popuvotuniso-nanudu.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Gijjhq7/vepoxonojimugapotap.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/pusixa/canones_de_dort_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/free_financial_reporting_books.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/sasobumivusux.pdfIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_cc7b4e7747fb4e25a5eda7eac13adb3d.pdf?index=trueIn PDF document text
    • http://lodusuvixad.rf.gd/gavewidikidenavu.pdfIn PDF document text
    • http://xerozodofuvu.epizy.com/samsung_smart_tv_remote_user_guide.pdfIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_1f86dbf39b104386abe2bf5a6fcddc76.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_off0000dc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC23 5364 bytes
SHA-256: 2278aee94961d4609fadb0687cc0b9a25c0388b9bcced6510eac06132c0aec9b
font_01_sfnt_off0000ee78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE78 10616 bytes
SHA-256: aa73162ebf149613d3ff47ef5d99a0dcda8796b1114990eb77c0d370dbc54966

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