Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e33289c4bc038ce…

MALICIOUS

PDF

73.3 KB Created: 2021-03-19 14:20:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e322c40b5b58c5b04124d17e4f5e3fb6 SHA-1: 0ce844e8d82990940226c63ab24456f52563294f SHA-256: 3e33289c4bc038ce1490781ad984b27444348d80b61f71448ef215fa6000ad61
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'seumenha.ru' and associated with a search query for 'formula racer 2012 hacked', suggesting a phishing or credential harvesting lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of using disposable hosting for link distribution, reinforcing the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=formula+racer+2012+hacked PDF link annotation
    • https://nakeripa.weebly.com/uploads/1/3/2/8/132814262/1ce658.pdfIn PDF document text
    • https://benejawu.weebly.com/uploads/1/3/4/1/134131543/8723797.pdfIn PDF document text
    • http://vitrinachel.ru/powitojabaxegaxafogeimunl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411683/normal_5ffb766ead087.pdfIn PDF document text
    • http://tdsevsvet.ru/kubebirupoxuzidqj8ss.pdfIn PDF document text
    • http://mx50off.info/best_spanish_frequency_dictionarytuikx.pdfIn PDF document text
    • http://copyright-help-center.com/728148251217f3a.pdfIn PDF document text
    • http://gbo.guru/dazajajikakokoxekomupevol39m9b.pdfIn PDF document text
    • http://about-fb-support.com/47749712031ggca0.pdfIn PDF document text
    • https://futinubub.weebly.com/uploads/1/3/5/3/135328842/nifurewurapofem_surikuf_mebekilusev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420448/normal_5fe833a8749a6.pdfIn PDF document text
    • http://cafechorsu.ru/how_to_do_radicals_with_variables4xkdw.pdfIn PDF document text
    • http://subumobo.22web.org/106207773.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pibamifa.rf.gd/what_is_special_about_sookie_stackhouse.pdfIn PDF document text
    • http://jetedobov.epizy.com/startup_company_save_game.pdfIn PDF document text
    • http://vedaremix.epizy.com/retiga.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/26897965774.pdfIn PDF document text
    • http://faxumev.epizy.com/free_audio_cutter_joiner_software.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/understanding_canadian_business_10th_edition_test_bank.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/89535108689.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB54 5344 bytes
SHA-256: 48ba18c1e7fc1f5837b1e3655ab0e60b2fdd875e256576e888775cea6da2ec0b
font_01_sfnt_off0000dd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD55 11800 bytes
SHA-256: 819a48494b71587a4294bb60d840c88f604dd274f60f22e90445940094f3a52b
font_02_sfnt_off000102b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B6 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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