Malicious PDF — malware analysis report

Static analysis result for SHA-256 85911434feab9cde…

MALICIOUS

PDF

93.5 KB Created: 2020-11-10 06:10:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 57d4d1717da29d79e0f188cd6f27fd41 SHA-1: d56644eec4f32f75e8104eef23fa1da41394d768 SHA-256: 85911434feab9cde4cb49893fd1408114ce51679a7e3bee988ed1e9a4d965e94
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://trafftec.ru/123?keyword=pokemon+legends+form PDF link annotation
    • https://zujususo.weebly.com/uploads/1/3/4/6/134615591/5d04033e5af.pdfIn PDF document text
    • https://jadimakadafi.weebly.com/uploads/1/3/4/3/134378671/dixivewoladed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_5f911026514b7.pdfIn PDF document text
    • https://morurotefat.weebly.com/uploads/1/3/4/3/134317018/tojerutu-rafalafu-labuxanezigixi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374376/normal_5fa4c40decd4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_5f90696bcb0e3.pdfIn PDF document text
    • https://mubuwejazanewa.weebly.com/uploads/1/3/4/5/134585617/c3daf8.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/menorezopeg_tegasoto_jizifoxanekoxon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421365/normal_5f99817868e7d.pdfIn PDF document text
    • https://kuvanipugeva.weebly.com/uploads/1/3/4/4/134445248/dipetijep_rizemoliju_gonufokow_tikir.pdfIn PDF document text
    • https://jekazaveme.weebly.com/uploads/1/3/4/4/134470158/6812702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f8ff6857d27c.pdfIn PDF document text
    • https://pasuliwipo.weebly.com/uploads/1/3/1/4/131452824/nixoke.pdfIn PDF document text
    • https://lezunodukulo.weebly.com/uploads/1/3/4/3/134341823/rotugeluweno_tirutow.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/pasawexawinogad/84023569055.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/tidaxazesotojukemewebe.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12684 3228 bytes
SHA-256: 06eaf0781dfee854e764f3038b73eac8c4fa64a574679a53b5b19077529921fa
font_01_sfnt_off000131ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FF 5084 bytes
SHA-256: eeb7849d58750d0fdd73da32cbfef173121f52b6f2fbcbe83df3bf338bb41d5e
font_02_sfnt_off0001433c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1433C 11216 bytes
SHA-256: 21948f97066c151d0b9c7945be09f226ebc0f6ff7b5cdef275367073b60b6e2d

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