Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba17f5a0987e8d8e…

MALICIOUS

PDF

88.2 KB Created: 2021-07-23 23:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f33300e6591285b3f4eac20b4f8b1870 SHA-1: 589237ce669f466456f0fe0e1b8dacc8ee75c8b8 SHA-256: ba17f5a0987e8d8ea1c99093e16838ca19a8437f79033a58764e23c78380cc1c
176 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple potentially compromised or malicious domains hosting PDF files. The presence of a callback lure heuristic suggests a phishing or scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/timadufapepezi.pdf In PDF document text
    • https://meccanicagambirasio.it/file/51548725685.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/galetizu.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/f44s543bmu5aohrprujffgdqispteeo5/komanedujevevavopepo.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/rafobef.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/7lkd5natpsagt1hvnlfhq8imo4/satawadop.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/508e56b4fde30e9d3135c198ec60ff60/sixose.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/47636907195.pdfIn PDF document text
    • http://nensi.si/upload/file/dijividifuxemob.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/6f2a23ba617166c24316c727bcd0ccdb/bovobilikilaxetedebowiku.pdfIn PDF document text
    • http://temple.mo/userfiles/file/pojogodufon.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b677c62ee01---noforadamepukisagoxom.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/b2dc2c001a26fcdc97495150be2e23eb/54448741363.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a774198e91c---30202496505.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/f35b2b8001c54832792c72537cd42dbf/62420171933.pdfIn PDF document text
    • https://datawire.gr/files/files/vopizabim.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/wirag.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc6ab04b37---68719607870.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160855075dff90---rebararamikifejes.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/vemipilila.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/dekibepenarex.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/4213661063.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/8t4h761haj0do6nr0h08svq07h/kumupetefageseparenipejov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=super+fast+english+speaking+book+pdf+free+download+in+urduPDF 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_off0000f165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF165 17528 bytes
SHA-256: 0d05eb2dca867733e79d6a694d0cc5e9902cfee89d93e14603362aa68a95175e
font_01_sfnt_off00011f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13751 11268 bytes
SHA-256: 4c406a3527bd2af0783f83b786322bd5f30af80a6b6e28432c4cfec8936c3c29