Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7351dd429495406…

MALICIOUS

PDF

85.5 KB Created: 2021-06-28 13:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef8eab118adf1422df2b1b5ac47ca913 SHA-1: 1861da61ffd9c0ebe760565c88db88879b9168fd SHA-256: d7351dd4294954067b857d7269087b385d90273ddd3daab28477315fb8b60641
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm with numerous URLs hosted on various domains, many of which are associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are typical of a URL redirection or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://al-bandak.com/userfiles/file/zafebujofuxikebulinagu.pdf
    • http://londonjip.com/userData/board/file/sajakojonugelane.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/e8b3a515c1f4a40f39b414f8ca072786/65918829736.pdf
    • https://peptidturkiye.com/ckfinder/userfiles/files/57477686557.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/8c514590d768f8f8c3de6adc916c4429/76390766713.pdf
    • https://peilimineko.com/userfiles/file/taxalufejelajasorizadajo.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/a7c9f77a8a19898d129eda7eb2ea1fca/simikesitot.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ab62e7f98---9053764725.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/444c40abe7d7e7f421505c870756d0cd/tuxelumerokekumukazu.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8624bdaa79---mifipafawajoketisimobi.pdf
    • https://kisikana.hr/userfiles/file/64846339406.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97eeefa2e---golowake.pdf
    • http://mcutech.net/upload/2021/06/file/16247685461690815604.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a24081ecf6d---kumim.pdf
    • https://dalilak1.com/userfiles/file/gekusinapi.pdf
    • http://phillipsbricksalumni.com/clients/56168/File/xiwutemixete.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f377c27ce7---xofut.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/8692c671207eb7ce67c5c95d695a3905/jalomijodojezijowiza.pdf
    • http://jar-ted.pl/file/wiwapeg.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607217ebddc37---25556595841.pdf
    • https://viticoltura-enologia.com/file/gotepi.pdf
    • http://skyfestival.kr/ckfinder/userfiles/files/79519744107.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cb2eb5c9c---86300606294.pdf
    • http://gistys.com/userfiles/file/93884957224.pdf
    • http://angarakshaksecurity.com/userfiles/file/dalobugifuvexixovujo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=ly+answer+photocard
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce68.bin
d0b8729ee3701f26b676f8ef888ee57f1802665cd2edd84ada73465a99e07e88
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE68 18464 bytes
font_01_sfnt_off0000febd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBD 16792 bytes
font_02_sfnt_off000116d4.bin
9878cab07b3c1f65581041fa33c62fadfc4244acb5d097bba03fd5955f2043a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x116D4 10632 bytes
font_03_sfnt_off00012f2d.bin
e6f908260ae9217f0be2c0f68a7c42e2f19706aba26e42176e0fb86abb9e0916
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2D 16900 bytes