Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59cc6827e67afa8…

MALICIOUS

PDF

66.5 KB Created: 2020-11-10 08:26:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c46d50f326ced92709c1236388aa069b SHA-1: a1df5d68e4c6d811efceda8d26a5c5e2e7b80926 SHA-256: b59cc6827e67afa836aa3cf7a1a114152ecb3dfe767ed2338476f1a7aa11f772
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffnew.ru/123?keyword=polygon+calculator+with+apothem PDF link annotation
    • https://jelamiwigu.weebly.com/uploads/1/3/1/3/131382248/retuw.pdfIn PDF document text
    • https://tizijepen.weebly.com/uploads/1/3/4/2/134234944/5912295.pdfIn PDF document text
    • https://birifaxita.weebly.com/uploads/1/3/4/7/134718336/29ef9.pdfIn PDF document text
    • https://kotafogora.weebly.com/uploads/1/3/4/3/134322717/5198588.pdfIn PDF document text
    • https://wovuposekase.weebly.com/uploads/1/3/4/6/134613379/varufup-ripupesa.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdfIn PDF document text
    • https://rulafusojuxibaw.weebly.com/uploads/1/3/4/2/134265871/94b7519a3.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/keporobore.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/kavitokolezub/25038402779.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/chapter_18_out_of_many_quizlet.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/vasotec_davis.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/pokemon_rumble_u_haunted_playland_challenges.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_off0000c4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AA 5364 bytes
SHA-256: 3b7787b533be8197887084e9bf5f006d7434c2763cb311521f78c4d37042a35c
font_01_sfnt_off0000d6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DF 11368 bytes
SHA-256: 943fcfb1c3430f02ec247b8d2c6ae2fc2da4fcd58d58800f41a44299824061bb

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