Malicious PDF — malware analysis report

Static analysis result for SHA-256 796f260769435e3f…

MALICIOUS

PDF

70.3 KB Created: 2021-02-12 15:28:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dd91682ab37bbc5db6766caa3c4c7319 SHA-1: 1de76f3c8fcc45d555b9ad197cbfc06a0b4fdabc SHA-256: 796f260769435e3fe7fe589f0a8a9e5991d4efdaf3546f2981613e9b11e462b9
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=asos+size+chart+us+mens In PDF document text
    • https://static.s123-cdn-static.com/uploads/4467586/normal_5fe038abd641b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391037/normal_5fcbe75a2d894.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5ffa60c1981a6.pdfIn PDF document text
    • http://armada.technology/importancia_de_la_investigacion_de_m2wsha.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378848/normal_5fec22fc9365c.pdfIn PDF document text
    • http://cashthe.ru/dakerarenaw215v7.pdfIn PDF document text
    • http://reduslim-buy.site/yellow_finch_tattoo_meaningarp6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417208/normal_5fcc5f1537769.pdfIn PDF document text
    • https://cdn.sqhk.co/pixefavenar/hbigavF/fab_corporate_mobile_banking_login.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/Fjajfhf/assistive_touch_iphone_x_missing.pdfIn PDF document text
    • http://creditscoreusa.info/58118261341dl2pd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/star_wars_aftermath_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/image_licence_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/53648791176.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/cap_guidelines_idsa.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/aws_cloudformation_templates_github.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_off0000d971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD971 5044 bytes
SHA-256: 638305bb75d0bb01c94a68b55464e08c2ac42616be12d3cd3c1cf60ee109f5b3
font_01_sfnt_off0000ea76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA76 9972 bytes
SHA-256: 65707bc90b43ad123260ef55199b8008eb6501beddf47044858f944f1ff079a7

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