Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f0d8d573fe9f74…

MALICIOUS

PDF

83.8 KB Created: 2021-03-28 15:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b01a9f2de76b6e30b54728057d6db1ae SHA-1: 700c95c168f383a06e2781eef9fd9673a2b07368 SHA-256: 10f0d8d573fe9f743cffaf092b438941519196290c7e9c97f162327f28432c83
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous external links, suggesting it's part of a link farm or phishing campaign. The presence of embedded URLs and the PDF structure strongly suggest it's designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=by+product+pricing+l%25C3%25A0+g%25C3%25AC
    • https://jibanexoruna.weebly.com/uploads/1/3/5/3/135338247/7171807.pdf
    • https://cdn.sqhk.co/radojiga/gyTmaOy/legends_of_dungeon_idle.pdf
    • https://cdn.sqhk.co/tofatuxurejo/gjJt9gg/log_thrower_mod_apk_no_ads.pdf
    • https://cdn.sqhk.co/puruwedisuma/gnKjaje/19584717680.pdf
    • http://taxevidel.medianewsonline.com/1309156248.pdf
    • https://dofolemabumef.weebly.com/uploads/1/3/4/4/134458616/94fea710ed8.pdf
    • https://seduzitatadobi.weebly.com/uploads/1/3/4/3/134371103/9b65bfe9.pdf
    • https://cdn.sqhk.co/xagaxubibiz/bgfZ6ji/lawejoxe.pdf
    • http://waliduv.mypressonline.com/aufgaben_bruchgleichungen.pdf
    • https://zogumunatol.weebly.com/uploads/1/3/1/6/131636745/4894039.pdf
    • https://noguvipeves.weebly.com/uploads/1/3/4/7/134717425/rorizas.pdf
    • http://xafawotilujos.mypressonline.com/92761171592.pdf
    • https://cdn.sqhk.co/bisuligiga/bhf5Mia/biravadivumolamoboxa.pdf
    • http://timinome.getenjoyment.net/how_to_make_amends_aa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jewizopukuni/magic_the_gathering_comic_book_list.pdf
    • https://s3.amazonaws.com/gowupuzokowuxes/41407414615.pdf
    • https://uploads.strikinglycdn.com/files/965d2feb-b497-4002-b96f-330e6f8eabb1/felopimagurimuzoj.pdf
    • https://s3.amazonaws.com/jarirotexab/76069338854.pdf
    • http://lexekuduwowig.atwebpages.com/xeworejiru.pdf
    • https://uploads.strikinglycdn.com/files/13fcdd0e-a6a4-4f9c-943c-409a7dbe6877/delonghi_nespresso_lattissima_touch_capsule_coffee_machine_en560b_black.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_off0000fafe.bin
2811d2d917f1b929e626ed88c65e225416bd5d14bde662579f6242d49ab06779		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFE 5292 bytes
font_01_sfnt_off00010d19.bin
9dfc5a075c8b5605757f9739e9d82073e2f54953f3366ca4f88828be936a38f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D19 23052 bytes

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