Malicious PDF — malware analysis report

Static analysis result for SHA-256 191693f08ff21f59…

MALICIOUS

PDF

71.2 KB Created: 2021-02-02 18:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b68dd333718d887680abf459130a5c3c SHA-1: b9d3626c43829ac00f09f33a0fb32c9fa5a4f4e9 SHA-256: 191693f08ff21f59936810a1149b55ebbdd8974359b9cc3ab2ba2518dc33c8db
196 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
  • 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://maypoin.ru/aws?utm_term=number+and+shape+patterns+worksheets+4th+grade PDF link annotation
    • https://cdn.sqhk.co/pabelemusib/iDPJgfw/play_free_sim_taxi_2_game_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418987/normal_5ffe5163551fa.pdfIn PDF document text
    • https://milajibejo.weebly.com/uploads/1/3/1/8/131871424/zeropudegeluloru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375528/normal_5ff98b4bac8ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451737/normal_5fcf2dc39407d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453740/normal_5ffbc88e9e70f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448323/normal_5ffb88d199fb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379968/normal_5fe4f37103f7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5fe2f58a2e610.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366350/normal_5ff3057dd4705.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484632/normal_5fdd46173a12e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412165/normal_5ffa1efb2b8b4.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/fomudebipefasu/63129970600.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/wevoguwokajemalutuze.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/79971105557.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_off0000d9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F6 5696 bytes
SHA-256: 077898c9713dad459488a68f0b00803a39cf3caedd3fd7e846f693f6df51e7ef
font_01_sfnt_off0000ed44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED44 10184 bytes
SHA-256: 02878d6bb5453350e26d2f024c510685ba3b5a482618edbcef91460e223e5ab5

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