Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c75ca7d4a45d3b…

MALICIOUS

PDF

70.3 KB Created: 2021-03-08 08:14:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a9ff013afd51b48a298715f15cec11f0 SHA-1: 49383bce940f56ada97542efbc3e2a39fb7604ef SHA-256: 56c75ca7d4a45d3bc4efe2b2915b18ddbd8fc01fcba7c503eb9745a54e4b064c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/award?keyword=recipes+for+air+fryer+boneless+pork+chops PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455194/normal_5fe481ad85ac0.pdfIn PDF document text
    • https://cdn.sqhk.co/naxupowu/gfnibha/13897133833.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/fhfXWBj/rc_racer_88.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/cFpifmY/2020_iihf_world_juniors_championship.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477409/normal_5fefb656475cc.pdfIn PDF document text
    • http://dorodirebupekel.iblogger.org/63405100129.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_10797422de1e4b2997dc274094b5ec78.pdf?index=trueIn PDF document text
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_064921733d924349b00c11b51574117c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b604027e-4c6f-4aab-8338-6c2f74063795/65143449109.pdfIn PDF document text
    • http://bamogadosi.rf.gd/79754068721.pdfIn PDF document text
    • http://limazajot.rf.gd/xml_formatter_plugin_for_sublime.pdfIn PDF document text
    • https://e0271a52-a7af-48e9-8a99-924ce320ec62.filesusr.com/ugd/be5703_508932fc4b9c4d64bb78fee46a21d714.pdf?index=trueIn PDF document text
    • https://e1cd7dcf-8988-4be8-9b1a-722367337987.filesusr.com/ugd/6203b9_0ab682322b494dfbb64474870c94cde9.pdf?index=trueIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_c4a8998697f04335b1a010f0b96989f8.pdf?index=trueIn PDF document text
    • http://tabukulazasidul.epizy.com/pixosol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0293ca23-dbaf-4ba5-9af2-3ccc8cdf249b/open_world_survival_games_on_switch.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_off0000d770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD770 5416 bytes
SHA-256: be22b100dfb44f033c6dc95e7075488e5c08078b333a32f9e492821c9b1e06a2
font_01_sfnt_off0000e9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E2 10076 bytes
SHA-256: f2d986b3bfe0f1cb0cff3124fbc95228a84b2188cea2f446959c10127669354a

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