Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d734840f201e80e…

MALICIOUS

PDF

79.6 KB Created: 2021-03-07 23:49:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ccc9e9b241b91409929361639a10ac5d SHA-1: 8051202d329184087afbffc42d6a5aa368925bd5 SHA-256: 9d734840f201e80e22e0c0049d65a17c7346b3410244663ead2f486a4538487d
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/wix?keyword=el+yaki+height PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424646/normal_5fe4d61e6db6e.pdfIn PDF document text
    • http://autobuff.xyz/tekorewomodiwopipza4ds.pdfIn PDF document text
    • http://appletopshop.ru/xevakugagaludewnymc9.pdfIn PDF document text
    • http://arm-watch3.club/informant_define_legalxpt5c.pdfIn PDF document text
    • http://topvideo.design/how_to_measure_cooking_oil_caloriesz8fag.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/95128634395.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460463/normal_5fe4e978b8fcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410694/normal_601a71bf1456f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403688/normal_60086fdb7033b.pdfIn PDF document text
    • http://richmaya.site/56114485740hffok.pdfIn PDF document text
    • https://cdn.sqhk.co/leloxoreje/jgZcfzx/99825053366.pdfIn PDF document text
    • http://podarokinsta.online/915128292270fd1p.pdfIn PDF document text
    • http://alfa-quest.ru/sobibivesizuburixyp18h.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/gfuijjb/hit_the_bricks_wfu_sign_up.pdfIn PDF document text
    • http://passive-income.ru/the_walking_dead_graphic_novel_full_setxpvph.pdfIn PDF document text
    • http://steelsho1.club/what_is_traditional_korean_music4orr0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d72b88-ee3a-4d59-9db9-8c6bc966e600/old_fashioned_love_bob_wills_chords.pdfIn PDF document text
    • http://xofigawarogipiw.rf.gd/positive_words_that_start_with_k_in_spanish.pdfIn PDF document text
    • http://jawegoxizifiti.epizy.com/the_little_prince_online_movie_english_subtitles.pdfIn PDF document text
    • http://rubigireluj.rf.gd/retepunedaluzuzofutapumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af28a87-5f78-4f1d-ae74-9fddfdbe2633/importance_of_renewable_energy_sources.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA51 4796 bytes
SHA-256: a44b5dd03a841fd9f32d3665bf79bc58d56b3a543f236e2db48f620f2ba2165c
font_01_sfnt_off00010ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB1 11292 bytes
SHA-256: 27c7aaeb1c367551eba51dc1806b2d30910e85639d0e9f5be18cada137f6a430

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