Malicious PDF — malware analysis report

Static analysis result for SHA-256 861109300641a964…

MALICIOUS

PDF

73.1 KB Created: 2021-04-17 16:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4e4da06dd0e3aa30ec197516659a8557 SHA-1: eb984eacf03877beaf0547ea2b2315008c532bc6 SHA-256: 861109300641a96459406cd87e5190078979de891602843500de8204b24fa97e
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 0.9998

Heuristics 5

  • 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 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://seumenha.ru/strik?utm_term=do+outside+ac+units+have+reset+buttons PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502511/normal_606ae7b8e597c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459325/normal_6062524d63c67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420468/normal_600b635617110.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/4jhidFd/6236785672.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451350/normal_5ff64a8790ebd.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/DMLic17/16584668595.pdfIn PDF document text
    • https://cdn.sqhk.co/jawezumate/hjS5ieC/wadufoge.pdfIn PDF document text
    • https://cdn.sqhk.co/wukatigubo/h3l4ajb/vazomukojofaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447431/normal_6055676ac4d36.pdfIn PDF document text
    • http://mokuduvejevuz.scienceontheweb.net/dental_radiography.pdfIn PDF document text
    • http://raxojomaman.iblogger.org/bomberman_fantasy_race_pc_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_b5e669c48ca14076a712ef7d57b4bf90.pdf?index=trueIn PDF document text
    • http://romepasuv.myartsonline.com/34985590431.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/bersa_thunder_9_uc_holster.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_cd2dc95806ae4f8da201e3ec48536a0c.pdf?index=trueIn PDF document text
    • http://lodabaximuxulul.epizy.com/grade_11_chemistry_textbook_ethiopian.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/what_do_u_learn_in_algebra_1.pdfIn PDF document text
    • http://wuliwopiveti.rf.gd/sufaxatoxoxipefarerilom.pdfIn PDF document text
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_404db554b5b64e69aa4cb5803d9e4ff5.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

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_off0000e179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE179 5196 bytes
SHA-256: 1ef59471a6188788565ab89b662bfd777aa7e456d0c3e46307d4662e390e8f4b
font_01_sfnt_off0000f325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF325 10544 bytes
SHA-256: b9b9a3e4b4f0e3a96ec8d6f2d62cf1c208508380de6da3fc2229cfffe08ba42f

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