Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a0c96ca0429eb3…

MALICIOUS

PDF

84.6 KB Created: 2021-09-14 08:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8e05b4c949a9d04bedd3776c851b90c5 SHA-1: d67fb39fd573d337879875ae80f8b7a9b4135103 SHA-256: 60a0c96ca0429eb3db014851e676835e22ac342ae5b01414db16fcba0ff6b973
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to potentially compromised websites and disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as a phishing trojan, and ML classifiers also flagged it as malicious. The embedded URLs suggest an attempt to lead users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/18995363582.pdf In PDF document text
    • https://jerseyshorepirates.com/userfiles/files/72256775539.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/161359f2699962---zijepovelalegi.pdfIn PDF document text
    • http://billsky.ee/files/file/56953810854.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613851cae45f3---lepeniliremenede.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/21820490345.pdfIn PDF document text
    • https://usgcambodia.com/userfiles/file/nirikugikebagojebirogixap.pdfIn PDF document text
    • https://shidoremicrosys.com/media/rekofezigelenizapixokivus.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139acf3c386a---4783419318.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/dejumuxorew.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/ecb942d2369ba98f9784f42c6d72ead4/lepemepigisikedewiniwoze.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/22216958690.pdfIn PDF document text
    • https://merlak.ru/userfiles/file/14597519309.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/2021912_45254_793.pdfIn PDF document text
    • http://synfarm.com/upload/files/34244271778.pdfIn PDF document text
    • http://nagyberki.hu/sites/default/files/fck_uploads/file/mamukobeduwube.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/29034306871.pdfIn PDF document text
    • http://skoleniridicu-online.eu/ckfinder/userfiles/files/94030491190.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/garewifefogijeko.pdfIn PDF document text
    • http://noithatlekhanh.com/Images_upload/files/53226677883.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/33813126061.pdfIn PDF document text
    • http://humanlitech.com/files/files/32366033419.pdfIn PDF document text
    • http://cudicio.it/images/file/62217602062.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/nebutel.pdfIn PDF document text
    • http://holzweiss.at/jivikatilazawimimubedav.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/56807690310.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=the+power+of+now+pdf+englishPDF 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_off0000e40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40F 10568 bytes
SHA-256: 1fe098fece8fb169c6b870434e8952a900b713ba2b8d5243b0b983b17bd9a918
font_01_sfnt_off0000fbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDE 19084 bytes
SHA-256: 7bd080a379c29c5a5f757274cefb5e73eb509533cff3e00bd79a7f654cbd225b
font_02_sfnt_off00012ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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