Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2c27efb3377c2a…

MALICIOUS

PDF

78.9 KB Created: 2021-09-09 13:11:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3b6212a7404a0442fd8779a1d3abd596 SHA-1: ca921ea5cd8e354b906ff119de13c5ca2e9d48cb SHA-256: af2c27efb3377c2a75682517383934e569e196ef6f172c37888c334e80c7330e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to multiple domains, including compromised WordPress sites, suggesting an attempt to obscure the final malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=filmywap+new+website PDF link annotation
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bfd45842d---vetorifo.pdfIn PDF document text
    • http://wmc21.com/ckupload/files/womubezazakorat.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/lefaluwajugogekififuz.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///82059338125.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/79588246731.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/37134639628.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/rifasowafegejukemapuxita.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/rozelosorizaxerekibe.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/kejipelafemupemep.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16133878f211f7---8654985316.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/41782107501.pdfIn PDF document text
    • https://livres-d-art.com/ckfinder/userfiles/files/20658531054.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/94934774299.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130cf11a9770---laxafowavena.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/91586534322.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/gekuxerafopidi.pdfIn PDF document text
    • http://drprdesaihospital.com/uploads/77286710764.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/72160815665.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/radodajodevijegi.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/71285913647.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/90412199916.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/dovivegovagitunonogobip.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16135108bed1e8---70851351334.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F2 16472 bytes
SHA-256: b4a49eb4c568cc5abb1786b04907cd409d2c2b77f1da5f393815a6eafdc29647
font_01_sfnt_off0000fdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF5 10508 bytes
SHA-256: 5d6c8debc7492e0a7cb29a2f924c63baa4da5018a1c4408400fb3625e8fb8bc0
font_02_sfnt_off000115ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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