Malicious PDF — malware analysis report

Static analysis result for SHA-256 808b65f663b02bc7…

MALICIOUS

PDF

77.0 KB Created: 2021-04-18 01:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0cfbcffff0a77872b3b28912113cae60 SHA-1: 71cd09e20ad107394737bd46bbfbe0570418078c SHA-256: 808b65f663b02bc7c97700c2077b16ee21f6aa46b104213013ad0bf14f7faf86
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • 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 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://pelibifir.ru/strik?utm_term=how+to+get+rid+of+acne+marks+on+shoulders+and+back PDF link annotation
    • https://cdn.sqhk.co/riwajamugem/bpibFPO/helicobacter_pylori_therapy_guidelines.pdfIn PDF document text
    • https://sazavilekin.weebly.com/uploads/1/3/4/8/134851962/nefigefova.pdfIn PDF document text
    • https://cdn.sqhk.co/savekedeg/gcqSijU/mojudisafiviji.pdfIn PDF document text
    • http://bitiwiz.medianewsonline.com/43323860435.pdfIn PDF document text
    • https://nodaveto.weebly.com/uploads/1/3/4/2/134266094/6056774.pdfIn PDF document text
    • https://figusemaf.weebly.com/uploads/1/3/2/6/132682639/858305.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/Jgi2kha/fuvaru.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/biziwu-gepumikaz.pdfIn PDF document text
    • https://vajefusuvujob.weebly.com/uploads/1/3/4/4/134464162/lebubewejomazu.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/iiEiKhe/christmas_word_search_games_printable.pdfIn PDF document text
    • http://sadesopawu.iblogger.org/how_to_turn_on_a_gas_fireplace_without_a_key.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/93444925553.pdfIn PDF document text
    • https://gixeroparot.weebly.com/uploads/1/3/4/5/134586235/janexogu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c06ff4e-9fce-437b-9d8c-2e913630064f/66415082685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975f6779-ff81-4cf0-a837-b55604c67170/40303409576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa17affe-d188-49c1-ac04-d6022f3a4f02/eureka_forbes_old_vacuum_cleaner_spare_parts.pdfIn PDF document text
    • http://badiwofotafazol.epizy.com/58882428165.pdfIn PDF document text
    • http://sinusisokopex.atwebpages.com/48247482857.pdfIn PDF document text
    • http://vujijemu.atwebpages.com/38418845788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05cf2bda-f5fd-4684-9b5d-9745232e4a17/grimoire_of_tiamat.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9B 5692 bytes
SHA-256: df4f7c1e0d9628dd2aca34bee32827fa47f059585cb19eaaaccc2b30ec9d7f1e
font_01_sfnt_off0000ffe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE8 10780 bytes
SHA-256: 8474a2318c0a81e41bf31b26d0283559646f2d28e23990875034396dbf56a7c7

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