Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d69e37793afcea9…

MALICIOUS

PDF

105.8 KB Created: 2021-06-26 03:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ba05f066805aa5a70fbfe2aa31e5b94a SHA-1: 1b92005e7fefd5f1535c3ef70ef49cd54d9149f9 SHA-256: 0d69e37793afcea98bfc7494d79b3d246aecbbe8b8b2e30f6c26e9f981162424
156 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 identifying it as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the presence of external URIs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819718084eb---62225901535.pdf In PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/a6a95857a0db161bf9550a4d2188a87d/36429517941.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/lefegudutirasumiwevo.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/92e4f8f6c1f62563a4f2c245a0a7faaf/pajuraf.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/fa610b76d168688461aeef97454dee17/wepaxaweteroxibolexoxilo.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/54661427083.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/3617051515.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/libixefopefedejigubod.pdfIn PDF document text
    • http://boeschfamilytravels.com/clients/43210/File/senajujoxosajeg.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/sisufagunagimulawo.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210525032036607221134.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/5641c3dac10a1f6c69727cd60eda90a7/77231433700.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/loxanolole.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/34358984588.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/0vku9tlcrmdpti9o1v6p2klhnn/zilodonele.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/kujemuduzuvovasival.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb6d6c5475---25915999337.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/ros1onugbg8evgticd7uvt3et4/88819765010.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/wokukos.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/19d3746e7e733faa4e46c2ed8faeda37/muwiwevovek.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9154b45840---burakobabaruxipakevow.pdfIn PDF document text
    • https://morabia.fi/images/file/69818192863.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=coconut+chia+seed+puddingPDF 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_off00013797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13797 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA9 18868 bytes
SHA-256: 05ceab102da05516bbaf84f70608551ab454b814cb13f13c3d46977ccdf62cbd
font_02_sfnt_off0001801b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1801B 10780 bytes
SHA-256: 1830647c5982d053efc1c3440dd834558c6e7eca93a9dd50dfd1ad1e4542e118

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