Malicious PDF — malware analysis report

Static analysis result for SHA-256 29cbb49874156279…

MALICIOUS

PDF

80.2 KB Created: 2021-06-29 02:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 848cdf177cb033ca44ee605ecb8467a3 SHA-1: 7c5c093a5cc351a7c70685378266fc8d85d0346f SHA-256: 29cbb498741562796e4deb50a7af130e4506fe76b7b14def1e3245aa66c07836
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=fin+your+fishmonger
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608440c36f670---45329965419.pdf
    • http://unseenadventure.com/userfiles/file/bikasadedinazawuga.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/o3vi11dnb202shoci2hcl2kqmi/1491945753.pdf
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/81441354735.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/4q6o30tg1ujtlrlipi525ihisd/69209567005.pdf
    • http://curry-box-deluxe.de/userfiles/file/47730239744.pdf
    • https://luyenthitoeic.info/userfiles/file/rowixilarit.pdf
    • https://aradovan.com/userfiles/file/xisigidupapava.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eed0c3f21b---rotifaxonosawome.pdf
    • https://sjalikave.hu/pictures/file/boritazixaf.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b921e081b---kumaputewudamufeba.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4e0f7c700---7791350518.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9692c4423---89365255789.pdf
    • http://mygotour.com/FileData/ckfinder/files/20210603_6DED7BDCE78FFEC2.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/64d6e8d8b279e85678ca996da0cb8e71/woxaxovonexipiri.pdf
    • http://usaoxin.com/userfiles/2021-5/file/faxopeloxoga.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/234162b151cb33022f0a60cdedfac874/jubukugazubapiga.pdf
    • http://www.dismaplant.com/ckfinder/userfiles/files/pusijaj.pdf
    • https://roweryelectra.eu/app/webroot/uploads/file/16205001530564.pdf
    • http://creptiles.dk/userfiles/file/7825351958.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/5929e5862e18d5cce751f9f3f4c4222b/28441373731.pdf
    • http://scamps.biz/userfiles/file/jatiwipuwokijuwarim.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607274574df21---netipapawefonukokideguz.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3683d7c139---sabegatesakuxegak.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160906c2aca8e8---xujoberexoduberi.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4118a3356---65909754175.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d897.bin
753d05ab15684f547426bff0a825edb3aca9328fcfb1bd8f9245890e2cea6910
pdf-font-stream PDF embedded font (sfnt) at offset 0xD897 10544 bytes
font_01_sfnt_off0000f06d.bin
f9a9491a7e615afdfb4b4dbda112e17b88a983c32ae70e34a564de9a0dcb03ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xF06D 16576 bytes
font_02_sfnt_off00011b96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B96 16792 bytes