Malicious PDF — malware analysis report

Static analysis result for SHA-256 c201b8516dc7ac69…

MALICIOUS

PDF

137.7 KB Created: 2021-03-19 06:09:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 737cf906b7a04c2ffc785991457e044d SHA-1: 9a013aec400344a13f141123c3887244f63e5738 SHA-256: c201b8516dc7ac69e2cada1768992915bb57ecf9f3edbe223e462877d9054871
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan distribution attempt. The PDF contains numerous external links, with one prominent link pointing to 'https://xezojetit.ru/wix?keyword=prayer+to+athena+for+wisdom', suggesting a lure to a malicious site. The heuristic 'PDF_SEO_LINK_FARM' further indicates a large number of external links, likely for SEO manipulation or to host further 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://xezojetit.ru/wix?keyword=prayer+to+athena+for+wisdom
    • https://zoforute.weebly.com/uploads/1/3/4/3/134352948/medab.pdf
    • https://gufulesem.weebly.com/uploads/1/3/4/6/134698375/434740.pdf
    • https://kofovozeregom.weebly.com/uploads/1/3/4/3/134313602/ralixizovosovog-jomotokemabuz-xinugijewakawi.pdf
    • https://segurawunazuzi.weebly.com/uploads/1/3/1/3/131381703/woraliwikefob.pdf
    • http://wide-take.top/sovofowurusimotol7g0gv.pdf
    • http://zoneeuro.pro/employment_letter_format_wordox4yv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vonutavekip/76934601633.pdf
    • http://vekabun.myartsonline.com/how_to_invest_money_in_stock_market_online_in_india.pdf
    • https://uploads.strikinglycdn.com/files/2bcd8af8-96e6-4aba-bcd6-184082106e03/how_to_heal_your_body_after_a_miscarriage.pdf
    • https://uploads.strikinglycdn.com/files/d94572de-7c9a-4b87-b0e9-9c1e744188b7/14087946708.pdf
    • https://uploads.strikinglycdn.com/files/13f00bf3-c4cf-42e6-bb48-7465655d42dd/casio_5269_sgw-500h_battery.pdf
    • https://uploads.strikinglycdn.com/files/d639f96d-2cd7-4eec-8190-c8ec4d059712/netgear_powerline_1200_ethernet_not_working.pdf
    • http://gegurobaz.myartsonline.com/vexiwaxebajabosiw.pdf
    • https://uploads.strikinglycdn.com/files/c5abc905-6054-49d4-b7e1-207de6e4e351/how_to_activate_my_motorola_modem.pdf
    • http://faxevimisosideg.myartsonline.com/72419940881.pdf
    • https://uploads.strikinglycdn.com/files/393fc3ff-6ed5-4314-a8d9-e677ca99ff47/61039432520.pdf
    • https://s3.amazonaws.com/suzujewa/pawijisofidexo.pdf
    • https://s3.amazonaws.com/lovetijif/86577447093.pdf
    • http://muvamubas.atwebpages.com/41116584622.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b935.bin
6a1de963e0227b562ce973750314320779237e95455a1aa7656530f87506e79b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B935 5096 bytes
font_01_sfnt_off0001ca68.bin
c8a3e16e1e6bfeaef430efdc3c6abbaaf4d4e0494e5eb4236adaa4a28b3d11fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA68 26248 bytes
font_02_sfnt_off00020b36.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20B36 4324 bytes

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