Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d06fa1398adea2…

MALICIOUS

PDF

92.7 KB Created: 2021-07-14 04:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d843a14da0a9f7a519372cb480ecabe SHA-1: 1860c275ef8f230d51a6ce362227b9004d4b76c7 SHA-256: c7d06fa1398adea21ae1a1e8ec00e1908912214e54820d586bd82d6d3a4f3da9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The presence of multiple unknown URLs indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/83c7f9507ac6f17228d7d9f75dd146c8/68339385352.pdf
    • http://alfavs.eu/userfiles/file/zopawopafakupivelofaj.pdf
    • https://nhachoxebus.com/upload/fck/file/14208113650.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/5a9f03c00985babb54290a87405dd92d/nironeketiravidotodigiz.pdf
    • http://feach.ie/images/uploads/file/43340923417.pdf
    • http://apsencollege.org/test/fckeditor/file/23647845043.pdf
    • https://c-effeimmobiliare.it/file/jamevufebugodita.pdf
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/f7586a6a36b2f2b01d335a39ec1de513/95606575471.pdf
    • http://ahcxdq.com/uploads/file/031736524679.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082c3b7f1b8a---zemovujimaneg.pdf
    • http://bannermaul.com/userData/board/file/zoxux.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b8da3ced9a7---pewivurudorukolonulok.pdf
    • http://seamacros.com/upload/file/xajawejamurawegipike.pdf
    • http://industrialdevices.in/uploads/timave.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4821cf8f5---gapegomiwuvuropi.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160821ee41c1a7---87049053083.pdf
    • http://tai-yang.tw/taiyang/upload/file/41551813528.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab01b1a6c3---28623713126.pdf
    • http://romento.com/uploaded_files/userfiles/files/gamirupugipinorus.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609df0d439ae0---pijelag.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f5bb7e818705887ec9fcb818b4b10c12/xapotiwasepujob.pdf
    • http://noahsmarinesurveyors.ca/userfiles/file/62835242570.pdf
    • http://cmtdental.com/upload/ckimg/files/99262541887.pdf
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/82099722548.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+sell+sexy+pictures+online
    • 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_off00010883.bin
5ef5d340e2245163ff0c73a8434ff71395ac05bd41419f29516618e3fcbe296f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10883 17048 bytes
font_01_sfnt_off0001350b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1350B 16792 bytes
font_02_sfnt_off00014d22.bin
0db908b1aab3d95bfc420b78316c969bcd3ba2520ff940f89948ededc460f08e
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D22 10596 bytes