Malicious PDF — malware analysis report

Static analysis result for SHA-256 c790f6e1c80cddca…

MALICIOUS

PDF

81.8 KB Created: 2021-06-28 13:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c60dd5e710a9f5bee81efcdb1647b280 SHA-1: a9c6b0af7df8d8a53f4679993d920d2c697c9014 SHA-256: c790f6e1c80cddcaa9dbf9bfe87393286424608a19d6234a6d40850be9909669
126 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs, many of which point to compromised WordPress sites or disposable hosting. The ClamAV detection and heuristic firings indicate this PDF is designed to lure users to malicious or compromised websites, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier clean score 0.2256

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://curry-box-deluxe.de/userfiles/file/jelobufusadivibififiwasuv.pdf In PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/3d845a4576b93a589cb634c916985666/rafobififub.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/zedimurivopaser.pdfIn PDF document text
    • https://rajaunited.com/contents//files/dofadujimoboxiruliv.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/mvdscvlj0i0p3073l6o69qsip1/vurafiwiwivep.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/91cff29adaaab30d4e2d8dae5904ce4d/xamazidiferelerobowezo.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/5996ee1613c4620cccea7825617e49a8/23315961978.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/44579013e0c8d4dedf106964c0f1cc48/35640628904.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f511e0c480---setawowetokurodubo.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609830b5c4a8c---vusowepomaposo.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/a2740c1f2da1972716a3d2038f947df7/60632124112.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d370b39ac8f---zaviriliveliriramomujepu.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813c3ad4787---runeximiwazugikiwu.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/63c4eb6c4ba4f60ef130da629b36c8b1/gesukaleridajasegebis.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/1537ac3279fd932d4681b5cb82d9a66d/8867982728.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a649a5eea28---83718315113.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/sugimena.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/4bcd7d888e123fca2bfe0f225994986e/piduwiwobuletuwowotekes.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/50d46ba8d04efd22b61486d214dccde4/nexovavaxajoxomapafoz.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/iius3o50p5cviavrrjj8r9v7s6/71933843669.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/57807367885.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/66fd060d11d9866ef87b0cc5b4785622/25133907825.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/93739468514.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/33e12e3397f8e699f5f9eef7db8a22b3/61925367642.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39ac263b94---rabulunuvifudaveliwoz.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160951bce57a09---gimezaneno.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/54344955383.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/4ab1521f9fd910492cec68822e04de08/20778518060.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=words+to+were+you+there+when+they+crucified+my+lordPDF link annotation
    • 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_off0000e97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97D 10872 bytes
SHA-256: 8a96c27ebed317eb00b5917020f8ac9eca345cd1e759ee314687654f2ab70846
font_01_sfnt_off00010271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10271 16964 bytes
SHA-256: 9e8c900046d964a0bd7e8e28c994642aa4a71419a45851bfdea255c78d24147a
font_02_sfnt_off00012e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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