Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f19ee153e241506…

MALICIOUS

PDF

77.3 KB Created: 2021-09-03 06:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a32716fe609d5b8f9936e188f7722596 SHA-1: c17f3345850cf1b04a4002cd5e101e239a0d4307 SHA-256: 3f19ee153e2415069320eb5d8c6f4c9cdf98fc96a2516a3891ffb8aa1ae87ebd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a link farm pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farm patterns strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://philabc.ru/uplcv?utm_term=craft+inc+business+planner+pdf PDF link annotation
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/vhf1hg9i9pj73aaia8nb4975p4/momitukinedo.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/80024938837.pdfIn PDF document text
    • http://195exim.com/datas/files/77382361718.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161057db1b6b8d---xusunajeburelaxuri.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/pgi36iobo5ion81esn061jgjvf/77574256061.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/8f4c5a6c408d78c477d5b1ef162ee3fb/33052289401.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/63842776458.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/zesukugerifotajikiga.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/3954474406.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609101dc90dfa---93370036180.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/76725100816.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/fokera.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/vefebowojologotatetezogiz.pdfIn PDF document text
    • http://henca.com/files/details/file/tigidegibajoxegafa.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3183cae32---tupaburaronubasakefakuf.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/759ca106114ac227d51abdc2a0f718e7/72031436180.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608a606942051---revun.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/56509653098.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/fotufikigovidod.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/kijavawejefiwofarugedama.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/ab3936a5e7eb61e8bb3200878d99a7c9/nulorufuzakanezezop.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/pilabedax.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/35309866949.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/sariruxibesureronekivav.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210830004615.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/wepamovolenozafivuxam.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_off0000c8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DD 10764 bytes
SHA-256: 466f2d21effe11d6df1350b41f1b86f6a2d862028f8fc0f62f7f53389b7cf47c
font_01_sfnt_off0000e17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17F 17620 bytes
SHA-256: 29913a719163d0cac9daf30d5a26ed1792edb3a685b55195556c96898deb8a46
font_02_sfnt_off00010ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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