Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f7c260f1e176d0…

MALICIOUS

PDF

82.3 KB Created: 2021-07-04 07:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 98e68510034b5993b7ac2a15f2630824 SHA-1: 45701fad3c9b01b5d0aa4c69f50b5ae2d4c58fcd SHA-256: 01f7c260f1e176d0ca4fb24147fd2e8f7163089f0081ca14e3210d3b6bc74bdb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/e6dba6385d56e12fa14a2bce8b126c55/510498380.pdf In PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/f61ae29e5a1981936330838ade661c23/91467579831.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/da5294c1d8be14a2966c4ac5f6a89d2c/bowijimew.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/9388cb05636f1967499420f43a95a882/20241417181.pdfIn PDF document text
    • https://paperland.bg/uploads/file/24808916299.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/ruwapesexaja.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/436b51c3ca668e1218a9ea4af081a670/patesebinun.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607696b43199a---firalubapa.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/61528cf67b836fac469da6f94df0a7d2/19420726672.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876b0b6623f---supukibebizosubolekube.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/60144684621.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/14c869a4de5f0826d08016a43f38bcef/visovupifawiwowel.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/53982163944.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/doxuwid.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160749b77c4355---zupoboroduxinimalevit.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/pijefetakobofu.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f282727d51---9278376169.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/c90s4e3krkh0v584kd267mt4r4/1339134622.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/ufe2hldomhc46dh9kt0vvo58d5/68826052484.pdfIn PDF document text
    • http://northjerseyseniormenssoftballleague.com/clients/2/22/22e10641a135963e7b476298ec508c3c/File/52833225880.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/47d890585c7d7d1a65c40b4582315c09/nosuwolevuno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ethical+ramifications+definitionPDF 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_off0000df60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF60 10724 bytes
SHA-256: 162c6205566ec6ab0509a327a9faf743268cbf6fef353b063f953bf41af3eb82
font_01_sfnt_off0000f7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CC 16880 bytes
SHA-256: 5d8c3809cb333b80bcdadd2fc274b45d36d0f2d2cc9761248fc229c0c61a15aa
font_02_sfnt_off000123d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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