Malicious PDF — malware analysis report

Static analysis result for SHA-256 573dfdb2df312bfd…

MALICIOUS

PDF

78.5 KB Created: 2021-06-10 14:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 99952247f2c91805b47e2b2082b9226a SHA-1: 71f0cef98fdc8bb7436918f5f984c8ec4aecf810 SHA-256: 573dfdb2df312bfdda45ac42c85087445070e5c702876f6f74a696f001c3b5c2
136 Risk Score

Malware Insights

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

The PDF file contains a lure for downloading 'Ark Survival Evolved apk' and includes a high-risk heuristic firing for a redirector link. This link, https://pixomot.ru/pbw?utm_term=ark+survival+evolved+apk+download+pc, is likely used to redirect the user to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://pixomot.ru/pbw?utm_term=ark+survival+evolved+apk+download+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370299/normal_602070db625ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456114/normal_60206cc274b99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413585/normal_60287c2fe25ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465564/normal_601553b0b64fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413705/normal_600574f93dda7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461763/normal_60354ac55883d.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4482230/normal_60b0ea36eb9ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425515/normal_6052b4b55a918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427300/normal_6019ab5674702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484143/normal_60329db7396b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446264/normal_60292bcb9c598.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pezeliv.pbworks.com/f/papelovumaneximog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c81fcbbb-4b47-4bd0-89b2-7cbb7e07fd29/ludo_and_snake_ladder_game_download_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7d35a70-7959-47c1-9a92-d07072004f9e/6409590676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cbc565c-3093-4a36-b167-2a365980d369/how_to_learn_vedic_maths_quora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fee37159-6ccd-4814-a980-af22a4c14447/what_is_u_tube_manometer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b99ec12a-3207-4063-bf66-5ecc85ff3e0b/3909568962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef27b01a-5a59-40a9-9363-5d966c663bc0/35294939281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e169a89c-4c1c-488e-8592-5a020553abc3/porarivesogozofo.pdfIn PDF document text
    • http://zudilazo.pbworks.com/w/file/fetch/144623640/nategewutugumeselowizo.pdfIn PDF document text
    • http://felinemumivu.pbworks.com/f/dadizobumiwojokof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f122c993-dbed-4c65-a0b0-6c80bd988b3f/topajamop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b7d2ef-f041-4634-b12a-ffa13694a02e/change_time_on_dsc_1616.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFC 5272 bytes
SHA-256: 158335a386ef93f5df7ebb09a0f7c4ca2843a44174ed36a57776639632e27a90
font_01_sfnt_off0001000f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000F 13164 bytes
SHA-256: d2fb8a01f3e49fd8f64a221d28651e01a02b676f98be114d20a083cc4affea26