Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa4c099dd359773…

MALICIOUS

PDF

65.1 KB Created: 2021-02-22 15:36:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8bd5fb96940f377afd28d26c214c4c49 SHA-1: a3f3d8d4d67928c4018b856b5fa92316472c7d2d SHA-256: 1aa4c099dd359773ae61837bdfadb31d30adb1ab0eb5afc7ab0b28371937ba23
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://rogefuza.weebly.com/uploads/1/3/4/6/134688393/9dbdae298f584a.pdf.
  • 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.
  • 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://yafferge.ru/wix?keyword=hamlet+act+3+scene+3+study+guide+answers In PDF document text
    • http://italystore.pro/vw_amarok_workshop_manualgvnsa.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/bgjlieu/nafaxiwikekisometovoka.pdfIn PDF document text
    • http://naturalgood.space/cub_cadet_xt1_lt46_owners_manualvdnoc.pdfIn PDF document text
    • https://rogefuza.weebly.com/uploads/1/3/4/6/134688393/9dbdae298f584a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_601dfbfa6170e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_6017c448b8293.pdfIn PDF document text
    • https://cdn.sqhk.co/moxasapiwer/XignRia/28454396523.pdfIn PDF document text
    • http://cherrypimp.online/claw_machine_win_real_prizes6n4kl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_60316ca39f4e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_60317d21194ae.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/fZXhaif/wubixitotow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472766/normal_6013a717140eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC217 5576 bytes
SHA-256: 466a725f7ce8dd45554a46d90f63aeff33076b0e8ee77da6344df995a2c1b806
font_01_sfnt_off0000d507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD507 10224 bytes
SHA-256: 2fb69170766e4e531d289cb13ec5cade5835e46903a54284c8bcc6d2e4800438