Malicious PDF — malware analysis report

Static analysis result for SHA-256 094c964be74aab13…

MALICIOUS

PDF

98.1 KB Created: 2021-06-30 23:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de47e2c73037247d7ed867e6edac97f4 SHA-1: ded09e2891c6a61015302ba3003048023aebcbaa SHA-256: 094c964be74aab13086a764797cf252cda5f93dcd93e6e5a439198aa195abe34
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 a phishing or redirection attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to malicious content or downloads. No scripts were extracted, but the link farm structure is a common tactic for distributing malware or conducting phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/5th9j7evmdk3ri320b867cnkab/93162716367.pdf
    • http://2446665a.ru/ckfinder/userfiles/files/44451854723.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/844rjthh80urqavikav8bc2v6b/namewajuzematuwuxuk.pdf
    • http://skolicka.eu/foto/images/file/26007937618.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a803028948f---seloferugasebomemobudive.pdf
    • http://ibconsulting.it/userfiles/files/27483690036.pdf
    • http://domeinbeverdonk.be/assets/files/file/rokopibojudalefuva.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/0eed11b8eefda98b9510a9fa2181fdd8/rigazisusatagawip.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160967f3a64a4b---fizanadotutotoredupibe.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/k03492kkp4dqeop4q6mp7tbqc1/57254556941.pdf
    • http://banghetretruc.com/media/ftp/file/pajuxuvax.pdf
    • http://cancercareresearch.com/userfiles/file/95691277082.pdf
    • http://mudrkanuch.sk/editor_uploads/system/files/38467141556.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/3a91d6e14d85e6519d267a76047b8a3d/41860599951.pdf
    • https://banghenails.com/upload/file/84987247022.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fba61e309---35462232576.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/b6655172dce14777452c95dc0c52928c/48524900763.pdf
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/1976c7189715b4ffc43827559615fb4a/95171625952.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16096486e380e0---posumibefenabasunam.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/0f222f5fabcf686dd93f52d8f260a392/25201015406.pdf
    • http://gamax-motor.cz/data/dokumenty/kuzevisu.pdf
    • https://gitedu.in/ckfinder/userfiles/files/rofagaxasezikusosa.pdf
    • https://people11people.gr/uploads/File/90752276729.pdf
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/10857481027.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=daylight+savings+time+ends+2020
    • 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_off00011d44.bin
d439870aec470e5c132680798aba0dc0505034e7b4fbdfe08e7f5a0e92ece3bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D44 17272 bytes
font_01_sfnt_off00014a0b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A0B 16792 bytes
font_02_sfnt_off00016222.bin
6fd39f5ba8e398d0296734e70c2954b1908a6f5e669ebd994e56f4746bf70315
pdf-font-stream PDF embedded font (sfnt) at offset 0x16222 10900 bytes