Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0687276a2a54a26…

MALICIOUS

PDF

74.8 KB Created: 2021-07-02 15:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5936535c8df515b2e189062dccb186f SHA-1: c4612ad6789783545d89355aad9542733702c60c SHA-256: b0687276a2a54a261a049e4a539cfdd8f76c2ad58938f5ada6eb270084807e2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. It contains numerous external URIs and link farm patterns, suggesting it's designed to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics point towards an attempt to exploit user trust through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://infrive.ru/uplcv?utm_term=evil+dead+movie+tamil+dubbed
    • https://andrejc.si/files/file/lalimipafa.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/1cb5ba66a8efd89096234827db075596/97576195481.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/006f6409f0dcc93ac0ffafd9e35551a3/jetalupam.pdf
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/3829b6840e88d9ee7b4665673b2430eb/kisubigizedaje.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/d0da96cbe46f05023b1b1da7d9e3bcab/29343696917.pdf
    • http://hockeydh.com/files/ups/files/47326354139.pdf
    • http://coytex.net//ckfinder/userfiles/files/58923587261.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4892a1b144---75163300463.pdf
    • http://thongthien.vn/upload/files/dalupedufamofimerakis.pdf
    • https://gencerenerji.com/resimler/files/gilovurazugigasozelu.pdf
    • http://thietbixanh.net/uploads/files/79659612676.pdf
    • http://blackhorsesc.pl/userfiles/file/jesenimetolopudab.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/k6bkaajio7acnppv9cbc1kcnm6/22320951569.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a7b2c80fc---52919081777.pdf
    • http://mbcasc.net/imgs/file/jevegona.pdf
    • http://kolesnikov.pro/ckfinder/userfiles/files/23716911782.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/88d9dcf1a230fd2be93f2c6e2398cefd/zofowa.pdf
    • https://stijsr.com/userfiles/file/44742481490.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/id3196qdnf7p8i70js01shpj3a/57152626383.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16089217e9543c---57177437236.pdf
    • https://laptoptranganh.com/data/dulieu/files/tuzew.pdf
    • https://a2designbg.com/userfiles/file/zutatumajezose.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/f6e455dba31dde6c233e1a1f0f2a8cba/belibojivakijopatoxas.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/4060fb45c7b68708d6603848109dceb0/35015738410.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfa3.bin
bfb1f0e678a94efa1f5afe84edf8108b958bdaa710e73602ba90994fcef5871e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA3 17784 bytes
font_01_sfnt_off0000eebd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBD 16792 bytes
font_02_sfnt_off000106d4.bin
6c49a72cf90202c51e99f6f02703f530d90768ff28b78e5ffdc721d25240c5d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x106D4 10328 bytes