Malicious PDF — malware analysis report

Static analysis result for SHA-256 d269d440caf34951…

MALICIOUS

PDF

77.6 KB Created: 2021-03-22 08:55:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 945ca71a4cc34a8e14f65fc75aa53767 SHA-1: d5de220605e3e20433311a658427161607a911e2 SHA-256: d269d440caf34951f4120d02ddc1188efad6c39ec482cb16de679f04a182d08a
176 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the heuristic 'SE_ENABLE_LURE' point towards a social engineering tactic to trick users into interacting with malicious content, likely to download further payloads or lead to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://maypoin.ru/award?keyword=pdf+file+convert+to+word+online+zamzar
    • https://senamevab.weebly.com/uploads/1/3/4/6/134689233/2021f3e9de222f0.pdf
    • http://pipavinekiga.mywebcommunity.org/gimolajofugutewakoxozera.pdf
    • https://cdn-cms.f-static.net/uploads/4421778/normal_6020ff0cd2ada.pdf
    • https://cdn-cms.f-static.net/uploads/4369504/normal_6029604aa063c.pdf
    • http://lizoguxumugef.mywebcommunity.org/public_speaking_tips_for_students.pdf
    • https://static.s123-cdn-static.com/uploads/4487381/normal_6003b3c29b588.pdf
    • https://static.s123-cdn-static.com/uploads/4393626/normal_5fdd95a199613.pdf
    • http://fafuzum.sportsontheweb.net/whirlpool_cabrio_dryer_parts_diagram.pdf
    • https://wabirigiraziw.weebly.com/uploads/1/3/6/0/136017191/nutigafime.pdf
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/gelemurexo.pdf
    • http://vevebopawo.mywebcommunity.org/rukikupirozujewe.pdf
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5fd76b70b48cc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fc68adee-8347-4558-926c-a68a269b27c2/5137867190.pdf
    • https://uploads.strikinglycdn.com/files/55f5abc1-5265-438a-8653-c5f788768500/mezobabugev.pdf
    • https://uploads.strikinglycdn.com/files/ad96f6d3-7832-4366-b643-ec6424e10335/is_arbys_sauce_keto_friendly.pdf
    • https://uploads.strikinglycdn.com/files/f49701c8-0581-43ea-aafb-a84e34b7209e/sylvia_plath_ariel_book.pdf
    • https://uploads.strikinglycdn.com/files/cd95b9c2-017c-4f92-9c75-b32f899897bb/when_to_capitalize_president.pdf
    • https://uploads.strikinglycdn.com/files/c3648c96-88e0-4c81-a0a1-090c4251aa47/58045545926.pdf
    • https://uploads.strikinglycdn.com/files/23b3c650-4434-4a58-be9c-1cef4f0e8932/echo_srm_230_weed_eater_reviews.pdf
    • https://uploads.strikinglycdn.com/files/5fd5029d-0f2d-484f-a008-ac34cc3f2ba3/36787366235.pdf
    • http://xonolori.atwebpages.com/10076881711.pdf
    • https://uploads.strikinglycdn.com/files/b3d25b49-e0d8-488b-af0f-018b20797aca/does_scarlett_2i2_work_with_windows_10.pdf
    • https://uploads.strikinglycdn.com/files/a682e473-b8fe-4c15-ae3b-db77d665a63e/how_to_add_transitions_in_premiere.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_off0000f1fe.bin
e6fab8a8a047072babff3352558de41d8af6542467167cdb55237f9d695e04a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FE 5192 bytes
font_01_sfnt_off000103b3.bin
d65d3e5297a9612cad39d5e7a0fa036d76b249effb897d704dbfae779201409a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103B3 10832 bytes

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