Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e7667bd690354c…

MALICIOUS

PDF

77.4 KB Created: 2021-09-09 02:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a08cd9a4a715a65aeff1f9c0a28d2dbd SHA-1: babd93078fa9d2317012ca21a0bc5fe98f4228d0 SHA-256: 08e7667bd690354c704cfbdda4de714aa351eab272973568f6162434a1cc3b13
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. This behaviour, combined with ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests a phishing or malware distribution campaign. The file's structure and embedded content are consistent with a malicious document designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4887

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://huntic.ru/uplcv?utm_term=cod+download+apk+for+pc PDF link annotation
    • http://yourhandmadeitems.com/userfiles/file/petiz.pdfIn PDF document text
    • http://chinahk-ip.com/chinahk_ip/html/files/editor/file/jerasilepulikudovilivo.pdfIn PDF document text
    • http://n3ss.ro/ckfinder/userfiles/files/45005870974.pdfIn PDF document text
    • http://bio-scan.com/userfiles/file/xapupogupigagovuwivuv.pdfIn PDF document text
    • http://bcslaw.hu/admin/fck_upload/file/nubolonigetekodeg.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/jupasamoxugaxi.pdfIn PDF document text
    • http://ljjxmining.com/uploadfile/file///2021090508350290.pdfIn PDF document text
    • http://dep14kirov.ru/userfiles/file/kazude.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/xajoxesavukurerupujelafeb.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94912274084.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161315f41949b3---73117561233.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/vosaxikazosaxivage.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/84787517206.pdfIn PDF document text
    • http://nieruchomosciklodzko.pl/files/file/tefofili.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/jizufaxuwe.pdfIn PDF document text
    • https://manhremhoangvan.vn/wp-content/uploads/files/62749941710.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/85183696155.pdfIn PDF document text
    • https://windsbs.biz/files/file/54701476436.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/wabififepomik.pdfIn 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_off0000d7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D7 16848 bytes
SHA-256: 7ad644fccc520c826bc9950894eed54a2dbb0a4181661991ad4c0f15fab28ff0
font_01_sfnt_off000102ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE5 10332 bytes
SHA-256: dc625aacebaeb30c03209d5c5bea2e27620ea0d93f3aae928d835b730877bf9d

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