Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f5bb4739f2dd71…

MALICIOUS

PDF

81.3 KB Created: 2021-07-25 15:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 67e953be29e7ff43a730e353471d554b SHA-1: 8bc5b3f5e45b773d2953fd3ceb9f26ba39468589 SHA-256: 02f5bb4739f2dd710af660b6c5df183521906cd85033c8a0b764874b4e1f1266
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to numerous compromised CMS upload storage locations and disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://asfalon.com/__files/file/19029369658.pdf In PDF document text
    • https://wrd13.com/force/file/59761911337.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160e2e86fd1db3---85877623037.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d9459b90a---36677966968.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/a85ff42df5e2f6949136577a8cdd637d/45898977161.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/81069146912.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/sffopbcf84cc1vlejttlpcidq1/duzakodadufagisuxarek.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160720b0849fe1---vagase.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075385c9c32d---xomuxatosubulaxigagesoke.pdfIn PDF document text
    • http://veterani-pushkino.ru/userfiles/files/zetepatut.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160d741892b6e8---zuxadixi.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/64381354933.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/19511673403.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/zajokodefezomazum.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/06/23/bazuri.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/f2769f70daa27c607914b562069ff0be/sexalobolituxig.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/pidelibasezaza.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/lk8tlo43vhe3ppor9s7o42ctt6/1947421867.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/55211839707.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/oo0idjs7knojaa71buof8cq2t6/40354813461.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b24b4a8dafa---33421477829.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/94658526635.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/55729149739.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=uyirai+tholaithen+athe+unnil+thaano+song+download+masstamilanPDF 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_off0000d77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77D 16984 bytes
SHA-256: c35c46bf6bdba2f07af8152e64642afbdad834f9162b7030d0ffe950835989a5
font_01_sfnt_off0001041d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041D 11000 bytes
SHA-256: 2ad77f4f27a63c40c487f6b1bf2268dcfebe01f0dba97ed94ab9da502722d775
font_02_sfnt_off00011d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1