Malicious PDF — malware analysis report

Static analysis result for SHA-256 854f292ccd984d44…

MALICIOUS

PDF

84.9 KB Created: 2021-09-19 01:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e213fc5005f81f528f27288a78bc3213 SHA-1: f64cc07334bf4ecc6c4f17312b2395445937d757 SHA-256: 854f292ccd984d44e68b9d92e3a76d995c06cf80e2de0aa114b5a48ede3585c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm with numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to direct users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://jmvlpslimited.com/ci/userfiles/files/47107758144.pdf
    • https://frontivo.ro/userfiles/file/felesimowegujeleketuxes.pdf
    • https://dammesliepas.lv/ckfinder/userfiles/files/bedugegezipexeteregibexub.pdf
    • http://awarelaxcentrum.cz/user_files/file/59199960106.pdf
    • http://chi-kara.net/Upload/files/rukuwidofudakux.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d846094c0a---80588150221.pdf
    • http://salocchi.it/userfiles/files/77193184789.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f49a1d8633---jilimanej.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2c66d8675---bunutijotokujolapined.pdf
    • http://kpotplace.com/uploads/files/duliliwufewazebosolir.pdf
    • http://usarsenal.it/userfiles/files/53227294000.pdf
    • http://krukewittfarms.com/userfiles/file/3533226165.pdf
    • http://caydinhlang.net/userfiles/image/file/81728151402.pdf
    • https://vntdc.com/upload/fck/file/28477354525.pdf
    • http://sun-tes.ru/files/file/77196054576.pdf
    • http://bargiel.com.pl/ckfinder/userfiles/files/kivokikolixojopabupa.pdf
    • http://bezagsecurity.cz/userfiles/78558797012.pdf
    • http://dongphat.net/upload/files/69154814549.pdf
    • http://sibinetweek.ru/userfiles/file/votovulotovobaxosur.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/7b260c95b4af976ca13c39a806063731/29421402067.pdf
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/83845123644.pdf
    • http://getdol.com/page_data/file/35085386637.pdf
    • http://www.drivingschool-brno.cz/files/files/vekabem.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/u84ehb6736kv2pftmdg1389jj2/39519214322.pdf
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/kolozopekabidimekarilaraz.pdf
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/saxobowevi.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/7cc451c883caa143ca4eb00518a856cf/zosevibepolevofed.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=samsung+galaxy+s21+5g+vs+iphone+12+pro
    • 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_off0000e3bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BD 16792 bytes
font_01_sfnt_off0000fbcf.bin
6237fe38d3178fc77d54c10dd9440d4810427bc9926a35be7b41498c1bd29ac1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 17884 bytes
font_02_sfnt_off00012a86.bin
979599e42ac0cd1893ae87cf02d925c20a97a5f7a63717311c1ae4a2ee3b19fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A86 11364 bytes