Malicious PDF — malware analysis report

Static analysis result for SHA-256 7959e9fa22a1c06a…

MALICIOUS

PDF

71.4 KB Created: 2021-02-18 12:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 60c62063f4338893f4862ee9c440a3a6 SHA-1: 3ac3f3a68b080a9ea152c09a0a63382b63c0f085 SHA-256: 7959e9fa22a1c06a0fef525105599047f9b7b23c42c3ab66883424a351b05991
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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.
  • 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/wix?keyword=four+against+darkness+pdf+ita PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495241/normal_6017327c11688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_600f92dc63888.pdfIn PDF document text
    • https://vupolape.weebly.com/uploads/1/3/4/7/134749420/luxixigije.pdfIn PDF document text
    • https://zujanotoze.weebly.com/uploads/1/3/4/4/134476942/zaxitenetaberor_wonawaw_tedixobo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419650/normal_5fc815334eadb.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/Yyhbb30/learn_numbers_for_toddlers._number_tracing_apps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420597/normal_600dee2f6f54d.pdfIn PDF document text
    • https://kafaziwe.weebly.com/uploads/1/3/1/0/131070109/9a5e7433c1e.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/zulezov/public_liability_insurance_certificate_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/fejiwewe.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/mitevubumovu.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/guide_etablissements_accueil_petite_enfance.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/blender_2._8_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1A 5196 bytes
SHA-256: e9f388cb7352af6122d8b9dbeb5fd9a016f324f3208545668555288e2f2967ce
font_01_sfnt_off0000d0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D6 1948 bytes
SHA-256: 9f1438f6caa6bea82600d032d9469e60a80dbbd75bcb5fdeb80f4c08f70602e6
font_02_sfnt_off0000da1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1D 9744 bytes
SHA-256: 3e2ac82c251e13da622f690dd3ab544e96d5d2bd4291261904bb2ef1cb4048e0
font_03_sfnt_off0000fbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCC 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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