Malicious PDF — malware analysis report

Static analysis result for SHA-256 9907861a9c8e5ec0…

MALICIOUS

PDF

69.2 KB Created: 2021-03-14 21:28:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5abe95f7b2846bdcfcf78f8186e5f3dc SHA-1: 9e2d5f86d0659d34e0551371389496016f1606ce SHA-256: 9907861a9c8e5ec046fda1522a893af3bd9ddd94a53545fd0394c028cb753bc5
186 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious sites or engage in SEO manipulation. The presence of external URIs and the overall structure strongly indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=%25C3%25A9pocas+literarias+l%25C3%25ADnea+del+tiempo PDF link annotation
    • https://cdn.sqhk.co/zikegasenar/SY4TfGu/amazon_drive_pricing_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/jgNhjK0/fofuxujavumupaguzubaz.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/igOibf9/29739054237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_60279190ba679.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/aiejejj/rotanupixuvafupisigaso.pdfIn PDF document text
    • https://cdn.sqhk.co/lowimipofevu/IAMidig/healthy_strawberry_milkshake_recipe_with_ice_cream.pdfIn PDF document text
    • https://cdn.sqhk.co/metusoteliza/djejbgf/6238082106.pdfIn PDF document text
    • http://koteyarn.moscow/windows_server_2012_r2_inside_outfdrx7.pdfIn PDF document text
    • http://mon-compte-cmb.best/99484089407o1qib.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/cjhkEhb/kezemureriluzutozopujum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388819/normal_5ffefb9d456c6.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/c7u0jds/dodecahedron_template_printable.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/2011_dodge_avenger_heat_tire_size.pdfIn PDF document text
    • https://cdn.sqhk.co/mojuzizimu/ib7gehe/matef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuxubakelixuzot.atwebpages.com/canon_lide_110_scanner.pdfIn PDF document text
    • http://nanaxidimidi.atwebpages.com/brockenhurst_walks.pdfIn PDF document text
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_946c499c7f2140c8a97e84cb6f30fac5.pdf?index=trueIn PDF document text
    • http://tafiwepamubov.atwebpages.com/domain_driven_design_quickly_download.pdfIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_68c6929e1b6246ce9ad56988cb2e89e7.pdf?index=trueIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_7eca38397df84173a1c02ef4407e9456.pdf?index=trueIn PDF document text
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_1d025a494dd44d128358e1bb93357b84.pdf?index=trueIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_aa8d9bb343cd4349b6399b24d60444ef.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD086 5252 bytes
SHA-256: 02ec46b6d3b1d26c863e619772ef4865273e9ef4a88e06935204b7345ba26998
font_01_sfnt_off0000e24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24D 10852 bytes
SHA-256: 7c7bdef7391994169e6c29cf503f08037abcdbee01aab307fe55af1a3fc9583e