Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc300b5f2b66530…

MALICIOUS

PDF

92.6 KB Created: 2021-09-07 18:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 34d61016026a663f44b4314f59a2c171 SHA-1: 56db85d3a9af6037d8d5f11e78dca31d343b7590 SHA-256: 0cc300b5f2b665306a2c9d4a062679612edd826882bf36c3942d5b27b5184c0a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm or distribution mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly executed, the structure and URL patterns are consistent with techniques used to lure users or distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5jh7n6tqp7tdhns3mj0ndf4t52/79545796015.pdf In PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb2be8e140---lifixuxudujiwanivekokuxe.pdfIn PDF document text
    • http://acril.ru/ufiles/files/28680273783.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/xewilixafo.pdfIn PDF document text
    • https://fuchscars.com/wp-content/plugins/super-forms/uploads/php/files/f305a0e113b3c08d9e2bd3126825efea/52768815492.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/76823383414.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/18832564514.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/68880671127.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/e61fc577c5d027519d774e94c944bc14/73200952715.pdfIn PDF document text
    • https://aokman-drive.com/d/files/82566750460.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/xazurixolezipup.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/15130362708.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b41699c8adb---54158906527.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160dda42c2f08a---42705775673.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/71466838247.pdfIn PDF document text
    • https://people11people.gr/uploads/File/lugaluvosunegikemuwu.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/0e64def3c7cc513d3b6d38857dd7113e/gapem.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/e217ccd81d61b5240707cb977aec0d82/64693777692.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/82162049674.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/vegolikufajosotonab.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/18436578277.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/50027100442.pdfIn PDF document text
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/8358027034.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/xikaxabafeximasafemom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=saturated+water+steam+table+pdfPDF 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_off000109dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DD 10744 bytes
SHA-256: ca1b7b8ab1fe8fc2a29e4797de28cf1b54acf1e7f4a39be56ad564d1c93b52dc
font_01_sfnt_off0001226e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226E 16332 bytes
SHA-256: 4112a7f77499aeae6407262344230d67f869af183a318242857906f05e6a78ca
font_02_sfnt_off00014cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1