Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b9e62c3f287d1a…

MALICIOUS

PDF

74.1 KB Created: 2021-03-31 22:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a21910e861e75f3b18f11ed20a9d5b91 SHA-1: dd9243cc0d3d88adb37d33e8528cd212be0838c5 SHA-256: a3b9e62c3f287d1a1f36919e85958c14ffecc34c2525888418f0480990ccc5f9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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://soxebez.ru/strik?utm_term=how+to+reset+ariston+washing+machine PDF link annotation
    • http://mimavuxaxokit.iblogger.org/online_car_race_game_free.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/gajinobuzenileveku.pdfIn PDF document text
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/2219852.pdfIn PDF document text
    • https://dupomogorudo.weebly.com/uploads/1/3/4/5/134595760/c249af951.pdfIn PDF document text
    • https://wukonoru.weebly.com/uploads/1/3/4/4/134441013/103ab74cbd.pdfIn PDF document text
    • http://vebuwovivulab.mygamesonline.org/cause_and_effect_essay_writing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485821/normal_5fcaf985885c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392441/normal_60210e9de1c79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wororezijetixa.atwebpages.com/82120271844.pdfIn PDF document text
    • http://buzumigasox.myartsonline.com/76750070782.pdfIn PDF document text
    • http://fazaburifug.myartsonline.com/c._i._f._and_f._o._b._contracts.pdfIn PDF document text
    • http://lanesoxulixag.rf.gd/14411942204.pdfIn PDF document text
    • http://gawupuzilolo.epizy.com/anti_static_foam_sheet.pdfIn PDF document text
    • http://sawokinajiralar.rf.gd/solving_quadratic_equations_test_review_answer_key.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_d1f1ea9eb2694766baad180a035a6434.pdf?index=trueIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_5970c030134f4ec58ab40c90dcdb08b8.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_off0000e535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE535 5236 bytes
SHA-256: ff7299a96f1e196d56a8ca1965a19d5d16e4ba08851373c20673eb555fa3b675
font_01_sfnt_off0000f6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E9 10796 bytes
SHA-256: 217ac55160a70294c6dad42eba9b5da14533b2e1ff122787bf13d86cc7624fa2

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