Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec2773932bd226f…

MALICIOUS

PDF

88.4 KB Created: 2021-05-27 02:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c3b8c160360f92344d8be0cb7b722b1 SHA-1: d1f29ae2b404101a9f78055bc38ce21e2a53228d SHA-256: 7ec2773932bd226f0f9e32b62a43dd62201ce37c8afc32210e7d645ab2b42799
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or SEO abuse tactic. The embedded URL and the document body's reference to 'sudarshan kriya' likely serve as a lure to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=how+long+to+do+sudarshan+kriya
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/3929476.pdf
    • https://static.s123-cdn-static.com/uploads/4369493/normal_5ffb69cd92f0f.pdf
    • https://libosimi.weebly.com/uploads/1/3/4/0/134000241/zijofi_jemipafolu.pdf
    • https://static.s123-cdn-static.com/uploads/4450259/normal_5fcda32dc68b2.pdf
    • https://static.s123-cdn-static.com/uploads/4370996/normal_5fc8fb86546f3.pdf
    • https://dimeropudefopo.weebly.com/uploads/1/3/4/7/134742885/fejani_piwuzikegaw_jotomuzanixig.pdf
    • https://nubawobadeg.weebly.com/uploads/1/3/4/1/134131997/4cff100af46415.pdf
    • https://cdn-cms.f-static.net/uploads/4383131/normal_601d9588efa12.pdf
    • https://zegemukugemilut.weebly.com/uploads/1/3/4/7/134707242/vuvewo.pdf
    • https://cdn-cms.f-static.net/uploads/4410731/normal_6012daaf1489a.pdf
    • https://nefarixuk.weebly.com/uploads/1/3/1/4/131407944/2659972.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/88a91aa4-996e-4a36-acab-9a51c1f562c9/12750013760.pdf
    • https://uploads.strikinglycdn.com/files/a945d4b4-b040-49ff-9f1f-cc6178a92023/what_does_the_river_styx_symbolize.pdf
    • https://uploads.strikinglycdn.com/files/ed334010-1d56-441e-a515-8ef3228b1b4b/poulan_pro_chainsaw_16_chain.pdf
    • https://uploads.strikinglycdn.com/files/6d7e8dac-b6d0-4547-b000-ba38485fca10/how_to_use_nuby_straw_sippy_cup.pdf
    • https://uploads.strikinglycdn.com/files/4c61f8d6-5334-45b2-b3a3-c7c10aa86220/bollywood_actress_without_makeup_name.pdf
    • https://uploads.strikinglycdn.com/files/c05673d5-473f-4de8-aa3c-1aac8bd88dab/90471088582.pdf
    • https://uploads.strikinglycdn.com/files/708704e1-7f41-46fe-bf2f-5ba5fc4c9403/how_to_run_a_half_marathon_for_beginners.pdf
    • https://uploads.strikinglycdn.com/files/e942edae-145a-4885-9264-e45e610c6804/20752648544.pdf
    • https://uploads.strikinglycdn.com/files/fea4c11b-17f9-429f-8c2c-b41f1c2a58c3/lekebavasizokolarosuk.pdf
    • https://uploads.strikinglycdn.com/files/5205c7ba-8ea3-45c7-8303-d6d27903ecc2/what_is_the_power_of_king_in_one_punch_man.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_off00011cb7.bin
7448ebe9b40b1468ad22d7c21e2efdc0bb7dec28f573397ebbf4caaff92c278d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB7 5308 bytes
font_01_sfnt_off00012ed0.bin
6414cdcf40db356ace5f5ced777ec4d21d9d31b4ff7a885078e3d85086dce3db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED0 11104 bytes

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