Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc095d02fdb8abf1…

MALICIOUS

PDF

69.1 KB Created: 2021-04-06 18:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8546d863b74c044c974c21a6e3555930 SHA-1: d6a9133fe5c79bec01d32e5290358da8ae91b9e3 SHA-256: dc095d02fdb8abf133b87b65ccfd338a565b8bc8d38f170978e3731c2c44c59e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, https://botokaw.ru/wix?keyword=craigslist+north+ms+personal, appears to be a lure for users searching for personal ads. While no scripts were explicitly extracted, the PDF structure and extensive URL usage point towards a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/wix?keyword=craigslist+north+ms+personal
    • http://fofumumitem.medianewsonline.com/56775879113.pdf
    • http://kovamuwaropepu.getenjoyment.net/articulo_de_opinion_sobre_el_aborto.pdf
    • https://wetololat.weebly.com/uploads/1/3/4/7/134710700/besij.pdf
    • http://modezewop.mygamesonline.org/chapter_9_access_control_lists.pdf
    • http://kakafeg.scienceontheweb.net/hp_probook_4530s_battery_price_in_bangladesh.pdf
    • http://rerixen.scienceontheweb.net/2574812628.pdf
    • http://kulokozataxat.22web.org/sewudawoputofujaji.pdf
    • https://zubisixoligifi.weebly.com/uploads/1/3/4/4/134479514/52049d.pdf
    • http://palopej.sportsontheweb.net/fefivijupegi.pdf
    • https://robesiso.weebly.com/uploads/1/3/4/5/134501854/zujuzifubasawez.pdf
    • http://kujedepis.22web.org/zulatix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ponazuxunuruko.rf.gd/andile_mngxitama.pdf
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_867a27d9e142416aa1e88759fb1785f6.pdf?index=true
    • http://fipizojuj.rf.gd/advertisers_information_packs_meaning.pdf
    • https://c7e723d0-7712-45a3-a8dd-8d8935e7c5e2.filesusr.com/ugd/c4f451_9f83c80843f840cb9b4e9ef26164f8cc.pdf?index=true
    • http://lekazukexofa.rf.gd/pupupuvelolebedo.pdf
    • https://uploads.strikinglycdn.com/files/edefe987-04c6-4b96-9895-52371f9ff866/2003_jeep_liberty_renegade_4x4.pdf
    • http://xidalagep.myartsonline.com/gebaj.pdf
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_31d47057eb9b4e929c9956af1ad3f00f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/82733293-a902-4c78-8d55-38e6771beae0/pdp_faceoff_xbox_one_controller_manual.pdf
    • https://57933e30-1e86-4cbe-ad2b-777cb72f9932.filesusr.com/ugd/235f1a_d249ec54e7c24fb397cae7045bf763de.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5eb855ac-29aa-4f47-a995-b3d283257e74/52240764911.pdf
    • http://jeborawaleko.atwebpages.com/catecismo_maior_de_westminster_comentado.pdf
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_5ce63888e8ac4dc0933db91f791f2568.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4e84d2b1-8560-415e-8607-c8b52ee2963f/texas_instruments_ti-34_multiview_handleiding.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d257.bin
d159689fe0e41ef6cd32cf90deb519b234629c39d4a7d9a060c71a2bf143d9a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD257 5136 bytes
font_01_sfnt_off0000e3a2.bin
3b95accdbe2c717d10155e372348267c3a885e2136e62b4fd5df6a45b71f2efe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A2 9832 bytes

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