Malicious PDF — malware analysis report

Static analysis result for SHA-256 f792d64125088363…

MALICIOUS

PDF

138.3 KB Created: 2021-03-07 20:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 43062cc8d16dc270f7d5f46fe9677ad0 SHA-1: 186950585b41f7ed2cb488d8cd5e9e7454e5b29e SHA-256: f792d641250883632e0aaf0ce010cef3aee460efa86f83ab5333c0efcf312b78
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary external URI points to a suspicious domain, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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=meiou+and+taxes+england+guide PDF link annotation
    • http://tasonilevibinu.22web.org/how_do_you_use_a_hoover_floormate_hard_floor_cleaner.pdfIn PDF document text
    • http://wozuxel.getenjoyment.net/93100600059.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/gfjbiae/xawopevamudibogetaru.pdfIn PDF document text
    • https://cdn.sqhk.co/lixipadiwel/cii3ahe/medizevosegoritatagitat.pdfIn PDF document text
    • https://cdn.sqhk.co/poladejug/cjgibIj/koaa_train_live_location.pdfIn PDF document text
    • http://nazawate.iblogger.org/aafat_naezy_song_320kbps.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_b3c93d593b114012a35edc0a168badf9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/global_competitiveness_report_2019_world_economic_forum.pdfIn PDF document text
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_7b0910ebd9b74a02abc4f79e564a714c.pdf?index=trueIn PDF document text
    • http://zilapiwet.epizy.com/61171799592.pdfIn PDF document text
    • http://xijejuvi.myartsonline.com/goodwill_meaning_in_accounting_terms_in_tamil.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_d5f94f91acd44d4e9be02cbd87bc482e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wegugus/23868037552.pdfIn PDF document text
    • https://eeeff038-21f9-42a6-bde0-cd945221d618.filesusr.com/ugd/9dc459_33572cc247ee4b15995eee9b01303064.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/vabikutez.pdfIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_c5d22d4a05a545eb8b2766e7bcb01c2e.pdf?index=trueIn PDF document text
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_f9c10aff31cf4929b43575a90b68a5c0.pdf?index=trueIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_8318b520b5134eb9abdb0bdbb9c30a9b.pdf?index=trueIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_23ab7cd1685e42518ffe3486d56fbd0d.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_off0001e5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E5E5 4972 bytes
SHA-256: 0b7a82c9922f0fb3570dbae44912db9be1ad8322ae89d74e6b2fc666118b777e
font_01_sfnt_off0001f6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F6F0 10676 bytes
SHA-256: 0a18b86a94fdb796b6cc2f655532091ea5984ebbe43464bae34b49e2d84f0309

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