Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c2671bdcac50b3…

MALICIOUS

PDF

69.8 KB Created: 2021-02-12 03:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19d0a45574b23fea00e2674e33a66a6b SHA-1: dda900317289f028d2d857792db85d1df8dba715 SHA-256: e1c2671bdcac50b340dcf2ec745dc4cd8a5bbd8277f7e6768f1ddcce10353200
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The primary URL, 'https://seumenha.ru/wix?keyword=soccer+legends+unblocked', is likely a lure to attract users. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were directly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=soccer+legends+unblocked
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5fd15cbe6891f.pdf
    • https://pixizibonemitu.weebly.com/uploads/1/3/1/3/131382366/miwigiforupunef-pagulamo-jipajuxob.pdf
    • https://zorusijumabek.weebly.com/uploads/1/3/4/8/134851431/wixitapugu.pdf
    • http://nature-ital.space/losupajewjye4v.pdf
    • http://soldonlakewood.com/free_aoi_bungaku_sub_indototl2.pdf
    • https://bowotile.weebly.com/uploads/1/3/4/7/134759747/saniwe.pdf
    • https://cdn.sqhk.co/tiwefuxab/CbR4jcN/best_chocolate_chip_muffin_recipe_uk.pdf
    • http://biomaniks.website/dapomujajigisuya4os.pdf
    • https://cdn-cms.f-static.net/uploads/4417305/normal_601d337634c27.pdf
    • https://cdn.sqhk.co/sewadokoka/fifhgXk/road_trip_snack_ideas_for_adults.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lixisariwulo/crossing_field_piano_easy_sheet.pdf
    • https://s3.amazonaws.com/senodiw/9629720009.pdf
    • https://s3.amazonaws.com/wisuw/ritobadu.pdf
    • https://s3.amazonaws.com/mipizaju/ponineneworutuxufefuw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c14e.bin
038fa1ab950c44d3e9630929586b6252aa66faaaa3ef8dffbc6ab4930a03bc8c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC14E 5556 bytes
font_01_sfnt_off0000d487.bin
3a1cba35d5c52007e9b5b6ff125608c0016c6192f39f8dd99956ae3574ba24a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xD487 5204 bytes
font_02_sfnt_off0000e648.bin
90e84b083e2ac2c4593d626cadf7ad95e18ff2525627fb19b03b7a122724d448
pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 10420 bytes