Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6e2682d717d300…

MALICIOUS

PDF

86.9 KB Created: 2021-06-28 13:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de30d2798fab31c410062ad323e78c58 SHA-1: 1f88d549e8e21696670afeb59a2fcf55393570ff SHA-256: 8e6e2682d717d3004dbec3f0e03d46d851247ea0324e7e150d01566470e7477f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm on disposable hosting. No scripts were extracted, but the overall structure and URL patterns point towards a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ketchas.ru/uplcv?utm_term=8+as+a+product+of+primes
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/ll04lu6qrtdttcovq5s40f5gbv/lebabetu.pdf
    • http://nousgarage.com/userfiles/file/viruxuki.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/4f77eb0e48f7687e43e4243ccf4f0d72/wagufugomunatewerurikimu.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca4f058544---betudunepafose.pdf
    • http://szpital-sulecin.pl/images/fckfiles/file/89674084996.pdf
    • http://www.clc-engineering.com/siteuploads/editorimg/file/wuralufuve.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160903d3c006b0---58186713517.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/2d8d4bcd7e797568439f43fdd47721c5/38203895803.pdf
    • https://media-get.com/userfiles/files/56259939145.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/984c04aef75dcb4f6261ae2d70b44946/7486772630.pdf
    • https://licorne-hotel-restaurant.com/userfiles/file/gokudikatufowutozus.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/6hu9n0fja2j7ifm9tofh288v57/50490728854.pdf
    • https://songhong-thudo.com/img/files/98853561545.pdf
    • http://seamcc.com/UserFiles/files/21603618899.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709a00aa738---berekumowosiju.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a073336d1b0---dufogufabol.pdf
    • http://steelbo.com/uploads/admins/u0/files/20210531003708.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af88297f2b7---47697462770.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/879a11abe61c79a398ad1393efc717cc/26195284357.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091bd5b207f2---patewinimunuxuvem.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/2kdmm6efkb39khj8aufls24sgi/xixilokotukomofebaru.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/bbfaf7040daedcfa4661bbc457f398be/lenogunem.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/q57rebukf0m2hdfg7lkd70lhcg/tawuzez.pdf
    • http://bestapp4u.com/admin/uploadedfiles/file/sitixuv.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608681e553d80---57466023208.pdf
    • 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_off0000ee3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3A 16792 bytes
font_01_sfnt_off0001064c.bin
30a71e928d4e17690d396a1e1e06dca0248698d933054fcc24f5c8f0d8fcfdc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1064C 17540 bytes
font_02_sfnt_off00013403.bin
ceb8981a6fd63fa0a162d5abc8ff90262dc8a0f39fadbbbd82b8877723401f53
pdf-font-stream PDF embedded font (sfnt) at offset 0x13403 10844 bytes