Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7ee40111ecc842…

MALICIOUS

PDF

85.9 KB Created: 2021-09-01 07:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 036f47909461ee3dfe185fdcf628b47d SHA-1: ce3b53f0060723e1989dc4fb9702f280a3471e01 SHA-256: 9d7ee40111ecc8421c9c5dfe8a2924417ec2e30a3c135786d9ef4016aa053813
224 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple URLs pointing to compromised WordPress sites, indicating it's designed to deliver a malicious payload. Heuristics confirm it's a payment redirection lure, likely attempting to trick users into sending funds to an attacker-controlled account. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eaa5aamumvlbvid5gsmkq61vf4/55978498336.pdf In PDF document text
    • http://drxzhang.com/userfiles/file/durizojajejasurarurizal.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/manigar.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a715388f7aa---72590214623.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/63983644424.pdfIn PDF document text
    • http://jngf.cn/files/file/pawatogirapaletukop.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608696730ddcd---minesezifusanukuw.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/81018150391.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/fupederoge.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/jiwuxokubezonukubabizimi.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/619bf6769a794783b316453197be1386/rediso.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608102d80a32b---sapurifukavologotav.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/74022941599.pdfIn PDF document text
    • http://delta-serwis.pl/pliki/dirukasivonopesowox.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/b552518ba70cbf70192722bbb1230f72/54127486885.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/dosologovugizatini.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4501291128---78084754179.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/673bc62be51f6a5c4357d9e5802ffd78/43596989037.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/mpb5b0ju8sv5ugm0h27ojkg6u2/wuwekatulaxiwubitapurap.pdfIn PDF document text
    • http://radtel-sport.pl/userfiles/file/medoke.pdfIn PDF document text
    • http://www.mananthavadynorbertines.org/www/js/ckfinder/userfiles/files/gamogifuregajijazabat.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/dufizapejagiloxobegadete.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/6ac0fe9e829b05a399e732eab21d7b15/segufemogunajaleve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=remove+freeze+on+my+credit+reportPDF link annotation
    • 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_off0000eadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADB 17232 bytes
SHA-256: 59ffed9afdac07636c5e538d801fc65648b28903adf31a37a8031ac631761a53
font_01_sfnt_off00011772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11772 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F89 10688 bytes
SHA-256: e8176bc1b15d13affd7475d612cc6b87bd7e8aa59d9d29518f2ade934469df0f

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