Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41897ccf9f01072…

MALICIOUS

PDF

88.1 KB Created: 2021-07-01 14:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0dd8a764965ee063bcd66ae38224546a SHA-1: 76fd6e580740277250eb770bd921578ca4ed5c60 SHA-256: c41897ccf9f010721ef3c4bb0f48a8ac04a8873c7c6d0bf840565ec0c0bf5da9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely serving as a lure to download further payloads or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/nf94aa4rait09rvu6er6enoorq/damobibikosolosararun.pdf In PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/36617632284.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/zepimawesizimafejusi.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/f24c4b0e1264c2e7b01521e0b1f0a5d9/94213857553.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/60e0aad040854cebf505a9f795dd6a7b/nonazepanuriwopulisarem.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1afd2b8efa62c2da819a56cc832c6d33/39896509305.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/zelovifugipel.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8b0c48917---15878005759.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/84953108565.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/4382249074.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/80b6snpm7ln0at43g59ip6lqna/66300033373.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/xaneferorilopiratagosub.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/muwufowiwe.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/a5bb997cec330b941d268b3fa818522d/37151573689.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/zuxuxerabixomuwumomozovam.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160711405363a4---68144628537.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/918ebbb9f1903368985463b4afa35335/remoweduramaj.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/7c60a4c1a6df905c90cba33ff756ee67/89148998949.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071221da8953---pusaruwijufez.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/spjthujekblmm3tir5qm5dknnj/nofatod.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/7e20c991d6a33466270971cdab510e40/divepinezimaw.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/32597259149.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a36589d9ac3---17680000390.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/9pfp4hquu9jrrss1vcdq0elil4/37446202662.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=robin%27s+laws+of+good+game+mastering+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_off0000f063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF063 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10875 18844 bytes
SHA-256: 6465d65ee885b8719dd2201b7a56e363d14a85b51e85ae1b27ee5360a685812d
font_02_sfnt_off00013963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13963 11148 bytes
SHA-256: 3a31521fcb2d17aa79f00cc96c42e84629a753efc06b5000e84466a7a4548516