Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ce7ccc0602b473…

MALICIOUS

PDF

79.7 KB Created: 2021-09-17 00:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a546add94a62dba7e05d5afeb35098b2 SHA-1: 00fc7f1c68ef9db63445a8f59e912a8c0e025db0 SHA-256: e1ce7ccc0602b47373fa03810d50d4bbbfe979b07b8ebbc62851644791929e3b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous URLs pointing to other PDF files, suggesting a link farm designed to redirect users to malicious content. The presence of a callback lure heuristic indicates a potential phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://smidgel.ru/uplcv?utm_term=what+is+g+pad PDF link annotation
    • https://atpl.aero/ckfinder/userfiles/files/ziduboforimaposomo.pdfIn PDF document text
    • https://ferropula.hr/files/raduzemerinajasi.pdfIn PDF document text
    • http://naim.naparts.com/images/fck/file/fixozawofurenokudaba.pdfIn PDF document text
    • http://huabulaw.com/uploadpic/2021-9/file/2021090105060373499.pdfIn PDF document text
    • http://fairway.cc/images/blog/file/nexogibi.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/kifuvarexewube.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/72223757117.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/osro5rvbc45ggkvng7dlalgd4m/zavexazizigig.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/36265165561.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/81701695063.pdfIn PDF document text
    • http://huynhgiabaohotel.com/uploads/FCK/file/mufibajodoxagikusuzipapam.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/gezoxuwovumajame.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/55305396505.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/rojagujinixovenerik.pdfIn PDF document text
    • https://movingalpsfoundation.ch/userfiles/file/nugezufufiv.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/93012987650.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/161310e8dbcacb---jurojov.pdfIn PDF document text
    • https://emtracing.net/userfiles/file/xajurozaxonibibivifi.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/sobukidojibewanerodi.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614046a3a12ed---vosogufog.pdfIn PDF document text
    • https://seerupit.dk/assens/file/96998539561.pdfIn PDF document text
    • https://www.sophrologue-nimes.fr/upload/news/files/gutuwesilajodokuworesurez.pdfIn PDF document text
    • 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_off0000d4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DF 17676 bytes
SHA-256: 5ee656524dfd3c37b01b5379e4e8ae65553688318d5f001ae00dec8dd619fc4b
font_01_sfnt_off0001035c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B73 10160 bytes
SHA-256: 8de67141e24864adcf70e4c22cd7efc073e95cc06dddf11318cc0d97e653b4ce

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