Malicious PDF — malware analysis report

Static analysis result for SHA-256 6979d8ed8fbc95f3…

MALICIOUS

PDF

95.1 KB Created: 2021-06-26 16:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 152b0a0419f6f3207c8121c54dead798 SHA-1: 6b284a6db16a42bfaabacce43c5e5a911f0f9656 SHA-256: 6979d8ed8fbc95f30a9d824bb3447b906601824e1ddb765e73c232c972afc287
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The primary attack pattern involves directing users to external, potentially malicious, URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c69026a56---66264122810.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/kn3ood7kv5j3n4qma8dk0i5vcd/vezisomomajixerugupu.pdf
    • http://fixafilm.se/userfiles/file/bakujebekeburetanu.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4eabf640ed---mowon.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/36559942200.pdf
    • http://www.awakohchang.com/image/upload/File/0525699714.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e671177786---1282260521.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92f806384---52065402433.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607210e359b9b---38750547156.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/8f533224d8e8c5876810a019661b30a2/fulejedaj.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fba4067a17---91664114591.pdf
    • http://yaqeen-eg.com/userfiles/file/piregeralojus.pdf
    • http://wearebryants.com/clients/3/3b/3bb22ab34fb8fe691aabc4d0498f9caa/File/tuxesetunewarinarovutab.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/c5c341cb6cc74fe77990095642cb4a97/28179163859.pdf
    • http://accronline.com/userfiles/file/20474002157.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/kc115v65cbknjnrsbpi6udv50c/gajanowerekediwonara.pdf
    • https://airshow-bg.com/file/defotowepijinekalir.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/52pu43mnoojrskbp14per2lcu0/28635549411.pdf
    • https://ahha.az/userfiles/file/zesuwozol.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3b3613fcb---penumesavopokulevewep.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=need+to+take+deep+breaths
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f447.bin
1ee06cefa6d450afe1af3ca356046296918b9317743b40034a3eb9eca8be026e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF447 17200 bytes
font_01_sfnt_off0001208c.bin
3d4dd8e53fb354ce917709a206628bd13a9f8b94845f528ea17c438ea401f82f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1208C 10456 bytes
font_02_sfnt_off00013838.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13838 16792 bytes
font_03_sfnt_off00015049.bin
4c4c4bc151506fc6cf1f2f8e2c5d867898d49d93b4157428a21e2103a6cf89fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x15049 19212 bytes