Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2918eb9b668418d…

MALICIOUS

PDF

67.5 KB Created: 2021-02-23 19:48:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: b159bb26ab36eabb92a9c798560a3b13 SHA-1: b07b09d078b0c7935ae6176e4c64d59fb9cb6f03 SHA-256: d2918eb9b668418d7dffe6453edd4f61648744aeee67996efac72eba1855567d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'crophysi.ru'. This URL is presented in a context suggesting a lure for downloading software, likely to trick users into visiting a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wix?keyword=how+to+mine+imator+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4475719/normal_601de471e52c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378386/normal_5fee9e66599f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417534/normal_60034b9fcdeaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416669/normal_60350362c4224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455673/normal_6025bd81bea1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479446/normal_5ffacfc7828ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384628/normal_5ff6b2442b3c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476578/normal_5fceceddb9f26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495246/normal_600a78e1a7a99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462727/normal_602663ab9ecae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372982/normal_5ffd7c6cea934.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425768/normal_5fcb022e97eec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tubodiluxav.epizy.com/goodwill_amortization_on_balance_sheet.pdfIn PDF document text
    • http://difugarulid.epizy.com/69601090071.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/86250775222.pdfIn PDF document text
    • http://fogetakid.rf.gd/lotumijusew.pdfIn PDF document text
    • http://tidisel.epizy.com/ea_bug_report_fifa_19.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/how_to_charge_i12_tws_without_case.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_off0000cd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD60 4848 bytes
SHA-256: bd74cc10d1b29bccdf34243959c643ca440f7b92a5b98e87433a700b09ab5ad1
font_01_sfnt_off0000ddcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCC 10216 bytes
SHA-256: 022e391adc15e8f6f064f9b232f2c9a96efd399e6c867a518b6628a47802a2a2

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