Malicious PDF — malware analysis report

Static analysis result for SHA-256 c59292cd7022e5ef…

MALICIOUS

PDF

80.2 KB Created: 2021-02-26 11:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ac41c1b04d259468a3d0bd5348b5351e SHA-1: 44fc5e7ebbc6f26408050694c2379704c1b0d39d SHA-256: c59292cd7022e5ef3655ee2ec5be6abce3debe4f0a2b8320b2d804febc573d98
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document exhibits multiple indicators of malicious activity, including a high ML classifier score and ClamAV detection as a phishing trojan. The 'SE_CLICKFIX' heuristic suggests the document attempts to trick the user into executing a command, likely to download and execute a second-stage payload. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates a business-email-compromise pattern, aiming to deceive users regarding financial transactions. The presence of numerous external links, including a link farm, further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://leonvi.ru/123?utm_term=microsoft+office+shortcuts+not+working+windows+10+update PDF link annotation
    • http://proflist-barnaul.ru/navataske1p2.pdfIn PDF document text
    • http://websporizle4.com/gopimibevifomalelorab21r13.pdfIn PDF document text
    • http://adanakebap.org/collections_english_textbook_10th_gradewhk03.pdfIn PDF document text
    • http://sellforce.ru/kyoto_autumn_colour_reportucb23.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/echo_pb-250ln_carb_adjustment.pdfIn PDF document text
    • http://vvd.bar/shooter_walter_dean_myerslspfn.pdfIn PDF document text
    • http://fortuneocredit.com/witukevuwadqfreu.pdfIn PDF document text
    • https://lufuwoxataj.weebly.com/uploads/1/3/1/3/131379696/4b2a8c345.pdfIn PDF document text
    • http://vekisonoloze.sportsontheweb.net/jepikakuj.pdfIn PDF document text
    • https://wufikasuruxur.weebly.com/uploads/1/3/1/6/131636700/8773676.pdfIn PDF document text
    • http://xifelaseb.22web.org/vetabewijo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lixasifasi/hartmann_group_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/50399664569.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/96658803754.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/dojenemumifa.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/14372992730.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/zuxuvalesuwusoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/evento_vascular_cerebral_isquemico_y_hemorragico.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCB 5624 bytes
SHA-256: 29771ca2064f0815d2da49dc982b8cf6381fa49f9c74e7eead85ae82ec3c8d72
font_01_sfnt_off000100f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F9 10492 bytes
SHA-256: ac271831820497795cc9b9b3fafc31c28710abd2de43a213fb78b2e420db290d
font_02_sfnt_off000124a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A8 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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