Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2be9bf5abb009ce…

MALICIOUS

PDF

108.8 KB Created: 2021-07-29 21:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: aa7c9a303c29814ad86a55f3841ab786 SHA-1: 2e349a086eb84f2662e6c6ca482f7a26cb8ccb5f SHA-256: b2be9bf5abb009ce4e087863700c620cab0858592fac40b652b1750e6684e10d
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/3a83199fc08ac280245ecb85187e8200/zimiguruponojuv.pdf In PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/65ba23fe3e75149150e2ade7734f1df3/sepuwik.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/60851515020.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/7vs2s92ivlb6bqsfislhj5a0c4/dikib.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/gosafijatarobikagolelitog.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/gs69go5j1shuno6sru90qtt7ml/fitepujesifiwogi.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/b55ca60acce85a30b46ce8ed22134481/40358671228.pdfIn PDF document text
    • https://taxiporec.top/wp-content/plugins/super-forms/uploads/php/files/rhg48to63i0du5l95o8h6tusjh/rizarupevixetedimelujo.pdfIn PDF document text
    • https://bursac.net/userfiles/file/62434513451.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/81845572995.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/84696066c58fb66cbe678cd19a1bbb7d/tufiganizotafoniwu.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc5c43f1cd---nupivefowidososite.pdfIn PDF document text
    • http://coffee33.ru/archive/file/54341042993.pdfIn PDF document text
    • http://ortetel.de/kunden/schurig/ckfinder/userfiles/files/58909367862.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cf9f3751c---tixutazabenagexe.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/tofijopezopiwutalajo.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/04b7d1a6eb1b881461ddfee35ac3987c/puxovudinarogoruzilu.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/7796100225c156a5816594a76a16604a/zilokirax.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/jejavesa.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/9ur2g14ie6bhepj9so6fa2dab2/kezegobolibevofuver.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/mumifagule.pdfIn PDF document text
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/a6dc3987ba3c3de99fa057fba3ddb33c/lubipatubirusizobuj.pdfIn PDF document text
    • http://cuatudongsaigon.vn/uploads/files/nurosum.pdfIn PDF document text
    • http://choinka4x4.org/cms/files/file/tekawar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=crystal+skull+puzzle+solutionPDF 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_off00014774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14774 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F8B 10640 bytes
SHA-256: a1a71dd37f992a27db11c047ce9c757fab989f75669f71a0f9ccef59859cc7c5
font_02_sfnt_off00017813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17813 17476 bytes
SHA-256: a5e9949bdf7918fb8998f9dcc9b1a66d17be0b9d6a305d68411c9de67d729665