Malicious PDF — malware analysis report

Static analysis result for SHA-256 f010e7b0a8dcbec8…

MALICIOUS

PDF

130.1 KB Created: 2021-08-10 00:37:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df3f4286eb6543f5ac02671297b69dfe SHA-1: a6657557d1dce024392ea8a3b90a115d4ec5b1d4 SHA-256: f010e7b0a8dcbec87bde0fefd56ce34bb6a381811c3aa5d77e19df73433227d4
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing lure. The presence of these links and the overall detection score strongly suggest the document is designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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://wsystem.sk/userfiles/files/puputasavananadebisi.pdf
    • https://altonika.pro/files/fck/file/povuganisopanebu.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44eb720d2f---rurovi.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfe0d0ee04---88334953412.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/ee358b3af0f02199f02b98eaf0c7ecb1/gemefuzomerafi.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d60380fc66---nedabujabamovax.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3fd21fca8---66561899258.pdf
    • http://beamstraffic.ae/amb/userfiles/file/sepiri.pdf
    • http://asea-admin.com/_userfiles/file/20210516201914.pdf
    • http://app8itebarandgrill.com/admin/images/file/88150035322.pdf
    • https://eclearusa.com/images/file/vuxoboxeketoru.pdf
    • http://veszpremkosar.hu/_user/file/butatipajupajazepexoxotep.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a222b097dd9---87953981773.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/78f44406a89333a7197930d551164a40/mugufakezupuzilokejap.pdf
    • http://neodentpetrosino.it/userfiles/files/wegizepiv.pdf
    • http://tanriovermensucat.com/uploads/genel/files/46151597516.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b1279951acd---zegekojovazibesirononavo.pdf
    • http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42656727156.pdf
    • http://mastervin.ru/files/file/84464601865.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fca1eafda7---16799873017.pdf
    • https://hyundainhapkhau.vn/upload/files/pirifubetonajad.pdf
    • https://ndmoyun.com/calisma2/files/uploads/koxedodexoz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=organizacion+politica+administrativa+de+colombia+en+el+siglo+19
    • 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_off000190d4.bin
2de848ace72d6342cd182da8eb37a785d9cf3e1a2a19a6dd502f81a08c9a09b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x190D4 20496 bytes
font_01_sfnt_off0001c44e.bin
d7e8b0d37e71ec241cf40ad6bc8ca7a7eecb47dc311199bcafea081a4a4ba060
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C44E 11368 bytes
font_02_sfnt_off0001decb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1DECB 16792 bytes