Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec127f7fe272c15…

MALICIOUS

PDF

79.3 KB Created: 2021-09-23 18:48:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f752f556471c2676c73dd4204922beb0 SHA-1: 5d08377f8d9499fb0dec6316429a47d1cf7cca7e SHA-256: 7ec127f7fe272c15cdaf93487d56019127d8ae7e06357472034f9fa3d8a81d10
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The 'SE_CALLBACK_LURE' heuristic indicates the document likely attempts to trick the user into calling a phone number, a common tactic for callback phishing or tech support scams. The presence of numerous links to potentially compromised or disposable hosting sites further supports a malicious intent, likely to host malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://thesnowmanicecream.com/ckfinder/userfiles/files/43643550056.pdf In PDF document text
    • http://mstreatmentadvances.com/userfiles/files/71710340936.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202109220444416601.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9ba02237c---29816466664.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/teluketusiruwezugiwaweri.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/12826115735.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/19978384192.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/e58697db3e8ce0998b07df83a88d5fc6/84082557959.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/24043634165.pdfIn PDF document text
    • http://avanti.pl/userfiles/file/tudanumise.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/72464522980.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/pomevatekizojevoragaxon.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/52165574647.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/63224006502.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/58733988e46ecf569dafa5d55093705d/55313195042.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/32744683494.pdfIn PDF document text
    • https://innovativallatgyogyszer.hu/fileok/file/wezulasutoram.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/58018715155.pdfIn PDF document text
    • https://kar360.com/resimler/files/jelokaf.pdfIn PDF document text
    • http://hzqzg.com/d/files/98778329924.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/xozogumatitelobumaron.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210921020551_1441917382.pdfIn PDF document text
    • http://msnladyboy.com/ckfinder/userfiles/files/bugexenexege.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=android+tv+video+chatPDF 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_off0000d3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 17412 bytes
SHA-256: 62d6031f4a24b1bd28da81dc67086340c52bcd38851001db35b0a6d004ef607c
font_02_sfnt_off000118b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B8 10300 bytes
SHA-256: 4e11db63baaf17254e804e5e0d75e043b92238e4ec9a968a042422b08aa9848e

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