Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f29dfc91de5478…

MALICIOUS

PDF

79.9 KB Created: 2021-09-20 02:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 54e4655850a777dd0994b5a174b9a2fd SHA-1: edc7a6318bbbfd6af975ec6b96633b9c3c70cf8c SHA-256: 39f29dfc91de5478ee1170298c36304bbe39f39dfa35efc76244554e06685b47
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to potentially compromised or malicious domains, suggesting a link farm or phishing lure. The PDF structure and embedded content are consistent with attempts to redirect users to external sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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://erainbowrealty.com/userfiles/file/91528013440.pdf In PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/675d4819dee6355638c37515bdab605b/vetasokepa.pdfIn PDF document text
    • https://encoyun.com/calisma2/files/uploads/56022229970.pdfIn PDF document text
    • http://elitvorota.ru/f/file/33011826768.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/galosoturek.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/litilenu.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021091112114994.pdfIn PDF document text
    • http://cpils.com/userfiles/file/kozaziwuvanodowalo.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/46645640956.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136cd3f862b9---fabufofujiliwu.pdfIn PDF document text
    • https://rotitelor.com/contents/files/58039289615.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/20219161927321083.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/wajutolosalotaduwiwored.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/mudikupomifolududakopi.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/75329277631.pdfIn PDF document text
    • http://topflexsports.com/uploads/gatogufijepusalemuwef.pdfIn PDF document text
    • http://we-women.de/default/files/uploads/file/nenarafokopuporezofudej.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/633429477.pdfIn PDF document text
    • https://bocrangsuthammy.vn/upload/files/20384479489.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/89044219091.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/fekuguweponapev.pdfIn PDF document text
    • http://carbonelite.ru/file/kimam.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/23231573358.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/biwojikogalikujujek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=ios+ninja+pokemon+go+hackPDF 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_off0000d235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD235 18228 bytes
SHA-256: 55eb4de1b0b30f5eb2cd578f1a5d49494ae9af9479709ac2ec07ad2a02fc624a
font_01_sfnt_off000101ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E1 10752 bytes
SHA-256: 381aabf937ad16fd97115e7621004b988eb8b2181c95ba262decc5a21a2e8ee7