Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a01d1df2887560a…

MALICIOUS

PDF

74.9 KB Created: 2021-03-31 16:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 103817f7bec87c9b9ccce83c26d75d42 SHA-1: 2e44fe2f31cc30fb8ce98a8190d9906956e0a632 SHA-256: 7a01d1df2887560ac9c510d2b03ebcc19cf0745885a81a0be46d8c916dce0e9c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a link farm designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/strik?utm_term=why+do+songs+go+missing+on+itunes PDF link annotation
    • http://dezirutumevolu.iblogger.org/sodobesilakafagomipew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_603638d3e3e19.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/bofovuxukivusuwulosetel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413966/normal_5fcd27773c28e.pdfIn PDF document text
    • http://kepogosibasenip.iblogger.org/anesthesia_movie_script.pdfIn PDF document text
    • http://sidodawoleze.iblogger.org/caida_libre_ejercicios.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/asciidoctor_maven_plugin_generate.pdfIn PDF document text
    • https://mawubuzepegi.weebly.com/uploads/1/3/3/9/133989242/lasod.pdfIn PDF document text
    • http://xebobimifu.22web.org/sijuwijaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391009/normal_5fcac176e6d69.pdfIn PDF document text
    • https://regifevadep.weebly.com/uploads/1/3/4/4/134476302/5175631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417312/normal_605447c0017f9.pdfIn PDF document text
    • http://jojalipubawil.22web.org/sofalipunesozigegeburow.pdfIn PDF document text
    • https://sibibogug.weebly.com/uploads/1/3/5/9/135990875/modujagi-sasimavomidabe-tepudolaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464311/normal_60642106d3414.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bexukavibume.myartsonline.com/94279951526.pdfIn PDF document text
    • http://tuganireriwem.rf.gd/gears_5_horde_characters_guide.pdfIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_8c7de12a6fa44dfdb20580ca4e23bff6.pdf?index=trueIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_c2622295d7c64501a140a0c72db3dba7.pdf?index=trueIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_a39b48803c374a718a0b6e9833975a96.pdf?index=trueIn PDF document text
    • http://jemileti.atwebpages.com/metafisica_aristoteles_garcia_yebra.pdfIn PDF document text
    • http://kutobolasiwe.rf.gd/baloterekageb.pdfIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_93232932fbeb4faea7c1e04a86c524af.pdf?index=trueIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_fc3c99e2b3c04af4b170cfe7e794a65f.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_off0000e8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A6 5016 bytes
SHA-256: 7a4787bc69c8c8f385486f403909fbcc0346d8164cdb32aa271bf91eb6df023e
font_01_sfnt_off0000f9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 10572 bytes
SHA-256: bdbfd632ef7f7bdf8a8665346737cd87c87aa0e3ba446d610bdee082c6b51512

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