Malicious PDF — malware analysis report

Static analysis result for SHA-256 546d2f79334ffbac…

MALICIOUS

PDF

75.8 KB Created: 2021-06-13 13:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0eb6c359dc7248b42fd671ed3fbd56f SHA-1: edb0d8cf94f6ec5a8a9ca97861c8f49e52330ef7 SHA-256: 546d2f79334ffbacee73f735e2bb016c8496105b4d39bd45db049b3272384462
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common tactic for phishing and scam operations. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and one of the primary URLs suggests a lure related to 'Camp buddy full version'. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a dropper or redirector to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/pbw?utm_term=camp+buddy+full+version
    • https://zixixowiw.weebly.com/uploads/1/3/4/6/134605173/filexipoger_rosowonixelibu_pibuselirir.pdf
    • https://jadanimotubow.weebly.com/uploads/1/3/1/8/131856100/af7dc20fd28a.pdf
    • https://jikumuwalomaj.weebly.com/uploads/1/3/1/3/131383204/1078042.pdf
    • https://voxonexagigiwal.weebly.com/uploads/1/3/5/3/135346225/winubop.pdf
    • https://duziduwavi.weebly.com/uploads/1/3/1/0/131070207/masavub_taxeli_pedudemuku.pdf
    • https://setoximusekaz.weebly.com/uploads/1/3/4/7/134714347/caae70d45486.pdf
    • https://vesilaxevi.weebly.com/uploads/1/3/4/7/134735958/tazeguvorozolav.pdf
    • https://webutukokixomuw.weebly.com/uploads/1/3/5/3/135317122/xovorixa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/63f5d90a-2ac8-4809-b10a-0b8dd6b7969f/who_is_in_the_cast_of_coming_to_america_2.pdf
    • http://sazupamufode.pbworks.com/f/55873472601.pdf
    • https://uploads.strikinglycdn.com/files/dcbcadd2-68d2-45d5-a720-d40a0f0f933f/why_is_natural_rate_of_unemployment_never_zero.pdf
    • http://liralafum.pbworks.com/f/cooking_mama_nds_rom.pdf
    • https://uploads.strikinglycdn.com/files/379cbf5c-c370-49fd-80c9-d37ae9ceba14/kidutedasezupurinelijo.pdf
    • https://uploads.strikinglycdn.com/files/0391685c-9cc2-41d2-8cef-bc54eb7f1092/jaypee_nursing_drug_book.pdf
    • https://uploads.strikinglycdn.com/files/35b10147-37b7-44e6-839a-384c35087458/29367533618.pdf
    • https://uploads.strikinglycdn.com/files/0cfd61f2-2e1a-4ff6-9b89-21db1807e9e6/edexcel_gcse_english_language_examiners_report_2019.pdf
    • https://uploads.strikinglycdn.com/files/f5c1e36b-7c8a-4795-b8e6-994a41e8b219/how_did_the_temple_in_jerusalem_get_destroyed.pdf
    • https://uploads.strikinglycdn.com/files/83b6b08c-2898-4f2c-bcef-6085def970fe/warm_bodies_streaming_free.pdf
    • http://tazijebep.pbworks.com/f/lezuxabisifoge.pdf
    • http://nukisefel.pbworks.com/f/ielts_reading_book_9_test_3_answers.pdf
    • https://uploads.strikinglycdn.com/files/d7bedf2c-502d-4055-8d25-fb804d6dddf7/zajevevuva.pdf
    • https://uploads.strikinglycdn.com/files/b3d717ba-b3f9-46ea-a35d-6ee2bbae7ea6/bopifupalide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb6c.bin
a6c7336a6819e630c4e113862ff2890fb80bbdc21071a7c078d9362ed6fbc7ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6C 5396 bytes
font_01_sfnt_off0000fdb1.bin
1ee2e82728215d50f00e10be26bb2eedba89d43ebb38e3ff75d3c92245bc1981		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB1 10624 bytes

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