Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eac7a117847a0b4…

MALICIOUS

PDF

89.5 KB Created: 2021-07-24 22:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 365ce95795a4a2158b4fecf5330e83ea SHA-1: 52be121411345c4d931dc0d9c7ab68c3d8d71cc5 SHA-256: 7eac7a117847a0b49aec6b1b278f1a96c3a77f2f82cf31e0e8bce7192026ad20
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. ClamAV detection and ML classification strongly indicate malicious intent. The document body is unreadable, but the heuristics and URLs point to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732dc1c8ffb---70380368672.pdf In PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/jifnd3cj84octt11lclhdhc2so/42667209713.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1e82dc884---kumadelirepugasowumigunib.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/vfnng5c5bkibgotr5bchhat6m0/sekeki.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/2a0216a911f1f0b6e54e86be318f439b/96752979922.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094123ec578e---sofurukidewelaguvutov.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/se8ru2l5mahf5vlnjarmg4nfl0/43383839943.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e41a4ce74---84096193915.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/d749552e5f0c4519ee04a5647ea06b4d/38120478425.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc2d0b30d9---jetoforibotinotowiz.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739183342fa---bivulexe.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/67157204629.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/a0204b231e93fa83c26677c428f63c65/zokusutivavunerorawesiti.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf74b59114e---33968970530.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/359fa7f442975d519ba7caa4e68b7d8b/remepepafuredasowim.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2604d31ae---devigixolanisazinojig.pdfIn PDF document text
    • http://industrialdevices.in/uploads/92060200383.pdfIn PDF document text
    • http://apvn.info/userfiles/file/30068701536.pdfIn PDF document text
    • http://burke-gallonfamilyreunion.com/clients/28163/File/33038372208.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/55tqvmeile0ld2mi54fg5e4e75/ruvepa.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/87802631803.pdfIn PDF document text
    • https://ovistar-dz.com/ckfinder/userfiles/files/zudomigiwumukagiletigara.pdfIn PDF document text
    • https://tsegypt.com/file/14788155707.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/wisuzafekikipogadiwakeji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=simon+symbolism+in+lord+of+the+flies+quotesPDF 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_off0000f8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D6 11032 bytes
SHA-256: c9ef3f6f1359da62e40a805fbf820f7f058b607ab3b77058ea4a5cd808643a0f
font_01_sfnt_off0001120e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A20 17076 bytes
SHA-256: 6e7ce183ce93a419a6b76e43a7ead68866923edc377a73990456ed2af03c2499

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