Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ab2a1016dc3cd7…

MALICIOUS

PDF

73.1 KB Created: 2021-02-26 00:26:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0f19cf8e87d5b91dd2562b70edc9ebcc SHA-1: 82039dfb7338381ba3e1a52e79cbe284f6cecd95 SHA-256: 70ab2a1016dc3cd77463be98969d98696db19e498cbc079e2ca2d2d67694c813
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://bologen.ru/wix?keyword=peterson+field+guide+to+medicinal+plants+and+herbs+pdf PDF link annotation
    • https://pifaxatopegamu.weebly.com/uploads/1/3/4/1/134108845/zonesasepoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426263/normal_600a3ee4cb786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486984/normal_5fd7412c93bde.pdfIn PDF document text
    • https://cdn.sqhk.co/kanemili/aybEQXL/how_do_you_kill_a_creeper_with_arrows.pdfIn PDF document text
    • https://rebumazezip.weebly.com/uploads/1/3/4/8/134860465/3521924.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwegamuvev/hghgGih/7125909200.pdfIn PDF document text
    • https://sigurapefudaji.weebly.com/uploads/1/3/4/5/134576843/1057031.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426687/normal_60030c751725a.pdfIn PDF document text
    • https://maposege.weebly.com/uploads/1/3/1/3/131378999/ribuwetezom-xipubaxafoxaw-masilotiwekiji.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/bewibiwat/bafuzigopewafowen.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/answers_to_the_impossible_quiz_number_56.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/makizide.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/fowasaj.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_off0000e0d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D5 5712 bytes
SHA-256: ef393106a1362b73df0a22165bfb8e84ef17eba0fd2adcbaed6417f68f3a845c
font_01_sfnt_off0000f40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40F 10384 bytes
SHA-256: 88073064466e032fad6d9c08d4322ea1ef57a0b55e7c17f562e4d1e13f691bb0