Malicious PDF — malware analysis report

Static analysis result for SHA-256 1418a92236892ea1…

MALICIOUS

PDF

95.2 KB Created: 2021-03-22 10:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cadecf441c298cd73185528ce97f82f4 SHA-1: 2e84bcc78d36975fd92d38bd059d60b51b4050cf SHA-256: 1418a92236892ea15af81f10c38d8b218045f5a4e8e27bc9a2a7cc5d5f729d85
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous external links, many hosted on disposable domains, suggesting a link farm used to obscure the final malicious destination. The document body, though heavily obfuscated, appears to be a lure, presenting itself as an instruction manual to encourage user interaction with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://vilenefex.ru/strik?utm_term=roland+fa+06+instruction+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467038/normal_602a6bdc887e1.pdfIn PDF document text
    • https://betetaguzom.weebly.com/uploads/1/3/2/3/132303315/7491074.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_6019f125f01b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486363/normal_5fcecbfc3b501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_60372b5924f4b.pdfIn PDF document text
    • https://gurazelifu.weebly.com/uploads/1/3/0/8/130874247/a1bbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460682/normal_5fdf92e65297a.pdfIn PDF document text
    • http://tekdouche.xyz/bootstrap_in_angular5x3c0.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/jifuvibulilopupufan.pdfIn PDF document text
    • http://esclub.pro/nc_learners_permit_test_study_guidewmmy1.pdfIn PDF document text
    • http://dalosizofovabes.medianewsonline.com/kyocera_duraxtp_e4281_4g.pdfIn PDF document text
    • https://jovopunok.weebly.com/uploads/1/3/4/8/134869647/rafejoj-sogimaji-pewifowezodon.pdfIn PDF document text
    • https://wawenefawopi.weebly.com/uploads/1/3/4/4/134494228/gizowixenepi-zuwepe.pdfIn PDF document text
    • http://tamasolesodaj.mypressonline.com/68699487124.pdfIn PDF document text
    • http://febiterozoz.medianewsonline.com/foxit_reader_free_download_full_version.pdfIn PDF document text
    • https://lazofakivew.weebly.com/uploads/1/3/1/4/131406449/172370.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/x1_dvr_box_dimensions.pdfIn PDF document text
    • https://dipabuxirakilat.weebly.com/uploads/1/3/1/0/131071076/zoxuwomaweza.pdfIn PDF document text
    • https://jipunusib.weebly.com/uploads/1/3/0/8/130813609/fomad.pdfIn PDF document text
    • http://gulivopaduro.22web.org/what_is_ap_art_studio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roresor.rf.gd/54445244411.pdfIn PDF document text
    • http://xifidoragu.rf.gd/48503445004.pdfIn PDF document text
    • http://zutaturusix.myartsonline.com/where_did_the_bible_really_come_from.pdfIn PDF document text
    • http://nixikoko.epizy.com/74694362591.pdfIn PDF document text
    • http://deketinak.rf.gd/basic_atomic_theory.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_off0001279c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279C 3936 bytes
SHA-256: 2a5dafcf08f344bcfd001e96d40a6800049395d4cb650df6e84ce93de6215e35
font_01_sfnt_off0001358d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1358D 5472 bytes
SHA-256: 2eba6e78a30de4a99a308b625738452bfa8c02a210538dfa6ce6f2f9718922d4
font_02_sfnt_off00014819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14819 11944 bytes
SHA-256: f8ac357cfa3da72ca005724fab9210ca5355ee35f8c93dddc49e55909dc4e6e5