Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ad0212290f339d…

MALICIOUS

PDF

88.0 KB Created: 2021-10-05 08:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 66ee18fed6504716b469795c868e3b4a SHA-1: c03a6ad35b6eade53189e35e02ff1d5b2aa182e4 SHA-256: 06ad0212290f339d083c556192689d54dbcedcd695467683480faa5ccd1e2af1
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues.

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 https://lrdreamteam.com/files/files/file/InfoProduct/file/1936966198.pdf In PDF document text
    • https://primer-spb.ru/files/files/42280186791.pdfIn PDF document text
    • http://dija.lv/public/userfiles/file/rezejoxi.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/66342710a9ffeb41f36014ae7412c447/lataxisuk.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/19738485442.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/98003456892.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///podozugokub.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/melirebipuvizaz.pdfIn PDF document text
    • http://fijiembajak.com/uploads/ck_uploads/files/80174554249.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/gaxinuted.pdfIn PDF document text
    • https://malinaionescu.ro/userfiles/file/latewugevukubefe.pdfIn PDF document text
    • https://marcvandewiele.com/userfiles/file/68840447239.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/kimetabulog.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/pikomezimazotomenel.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/73740672315.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/62714264681.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/vitajipun.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/jonusekip.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/79851366514.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/a913d1d112e4a0c77897b89e82f04552/jotozewefosewar.pdfIn PDF document text
    • https://karthikaspices.com/uploads/file/36004994252.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/wefemoregi.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/sujejenug.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a997105e2a---74507470976.pdfIn PDF document text
    • http://sportschoolindex.nl/images/uploads/81910868496.pdfIn PDF document text
    • http://www.psyforyou.nl/upload/fckeditor/file/17443371109.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/gasifagunilexuxi.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/19095580992.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=names+of+male+saints+and+their+meaningPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A8 21072 bytes
SHA-256: 30349ec503fc1dc16726baab2c8548478d4665e425851f9c1591b0bfe9eb4717
font_02_sfnt_off0001391e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1391E 10776 bytes
SHA-256: 93792a41d69e36ab4b1d6eaa963c881e1d99788960ec9b1bed686f92e7e0cf14