Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3864750c7d0d047…

MALICIOUS

PDF

91.8 KB Created: 2021-04-30 21:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12230f547411566bdc59c6daf1f91b4e SHA-1: b064903c274934abfc84e71496bbbaa5673e1302 SHA-256: f3864750c7d0d047ee41b62c73171c1488e9d398c6ad32a4b098412bee959c83
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for phishing or SEO spam. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to drive traffic to various sites. The primary URL, 'https://seumenha.ru/strik?utm_term=is+there+an+app+store+on+apple+tv+3rd+generation', appears to be a lure disguised as a search result. While no scripts were explicitly extracted, the presence of many external links and the ML classification strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/strik?utm_term=is+there+an+app+store+on+apple+tv+3rd+generation
    • http://sudedelanefozuk.66ghz.com/2187812902.pdf
    • https://xemageka.weebly.com/uploads/1/3/1/3/131380316/3100134.pdf
    • https://zagiwesojuju.weebly.com/uploads/1/3/2/7/132712322/doweratuvuzedufaw.pdf
    • http://antonioit.fun/lords_of_chaos_book_reviewtvc2y.pdf
    • http://doordash.link/mesageneo1lsd.pdf
    • https://nibotilujegaw.weebly.com/uploads/1/3/1/3/131381886/zezipep.pdf
    • http://koreatop.ru/modes_of_hydraulic_fractures2vi1a.pdf
    • https://fiselowozol.weebly.com/uploads/1/3/4/3/134366189/7656546.pdf
    • http://instahelpforbusiness.com/89845114916gq6e8.pdf
    • https://rigivopamakor.weebly.com/uploads/1/3/4/8/134869382/9c363156bf6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wubexemetaxoru.epizy.com/fha_gift_guidelines_4000._1.pdf
    • https://uploads.strikinglycdn.com/files/dd02db97-947c-4f2d-b926-48c62deed13c/mass_effect_andromeda_guide.pdf
    • https://s3.amazonaws.com/tonisefoteka/xewumu.pdf
    • https://uploads.strikinglycdn.com/files/455ab010-d3fe-45ad-a5b7-7a59dffb9a04/playing_card_club_symbol.pdf
    • https://s3.amazonaws.com/kavifunaruvi/47642490453.pdf
    • https://uploads.strikinglycdn.com/files/ff546fd5-a03a-4caa-a844-60ea5155696f/wodikupepezi.pdf
    • https://s3.amazonaws.com/likerajatob/vipibibejavumuzix.pdf
    • https://uploads.strikinglycdn.com/files/8426fb96-a959-4706-a542-cab317ed0949/que_requisitos_se_necesitan_para_sacar_la_doble_nacionalidad.pdf
    • https://uploads.strikinglycdn.com/files/37ad9f70-28fa-4820-806f-30db0c751f02/43543636360.pdf
    • https://s3.amazonaws.com/tometubufimopim/87899553311.pdf
    • https://s3.amazonaws.com/bipovoromoj/babetorusetizadizeg.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4df.bin
7a71b944b648de9c337f25ef78f00b3e55a2c6b82367b0c79897129c17b48cad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DF 5172 bytes
font_01_sfnt_off0001065c.bin
edb7052808c9e44734364ffa04a0512db93c4c73f01056a3f60911ab8ae8b59f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1065C 4496 bytes
font_02_sfnt_off00011685.bin
cd83178dc0c81d08922117197b00f25e1c83f22ecb1aa7a82911534b94480a29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11685 11464 bytes
font_03_sfnt_off00013dcd.bin
d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCD 16060 bytes
font_04_sfnt_off00015265.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15265 4324 bytes

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