Malicious PDF — malware analysis report

Static analysis result for SHA-256 df006bc9fe788d96…

MALICIOUS

PDF

75.3 KB Created: 2021-09-02 11:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dd08e16c5a2012364f97b4c199e40c42 SHA-1: df545c28597caf35ab2776533d6d5e4f306dc78f SHA-256: df006bc9fe788d969f6f23105d7bc21ddc0ac954f82e199614d8e368c6c3ab12
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs strongly suggest it is used to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pixomot.ru/uplcv?utm_term=child+development+and+pedagogy+pdf+assamese PDF link annotation
    • http://nirmalapublicschoolerumely.com/userfiles/file/52086812013.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/75d6bfc6dafc291460d4ebfc44270215/86372352145.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/tozexadokadivupixowojogi.pdfIn PDF document text
    • http://grupophi.es/uploads/files/jetag.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/j4773f0j3joe85jrtaei3ple85/56996474626.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/31996934034.pdfIn PDF document text
    • http://compsult.net/userfiles/file/xedalomidazelokamusum.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/32508898855.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/59919495501.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/samexedujovi.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/kusekoraxe.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/3d85d2cb431f64c8b57f7e8ca8c777db/sudivitigerutoz.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/lk03jg60g4semgf195u2224tf5/zasavabaxopezivivuvot.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/81100100825.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/penokavewumonetutap.pdfIn PDF document text
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/47025745575.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/wilikorexozezum.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/c0ead04fa3b84c2aac53bd34b282c89d/simenos.pdfIn PDF document text
    • http://walkandwagforveterans.com/clients/9/96/96cc06f6b2a5429c1325f0b535cddba6/File/49880972516.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/13044044711.pdfIn PDF document text
    • http://suankaew.net/upload/userfile/files/barogazoboleluwo.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a35dba94ccb---45202799958.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/65331702655.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB82 19212 bytes
SHA-256: fa3e39c6389365d372f9f8b5ad078e66fa34e735830236111d18e8e286a5c1dc
font_01_sfnt_off0000edcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCF 11056 bytes
SHA-256: adda1620c8762d1c9051e717dd8c25ba288bb14e1296cbbf06a02be8a9720998
font_02_sfnt_off00010737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10737 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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