Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8783e135722c09…

MALICIOUS

PDF

68.8 KB Created: 2020-12-10 02:39:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ce0955553d6dde48afb671463506d798 SHA-1: e20b9395c33d1dc6c4480a18e7b06e9baa1fe3d6 SHA-256: ba8783e135722c09b552996785121e51311dd73444cf82cbfa7ec2e2954a9319
254 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
  • 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.
  • 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.
  • 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://traffine.ru/123?utm_term=john+paul+jones+job+bachelorette In PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/liruta_momuduxudafaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477369/normal_5fb02f89a7052.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/jasurunavopudej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/38faa3c1-f482-4a4d-abe7-d45dcf75ac7c/gaxebelariduvig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b7f594f-e860-46f2-9d8d-709629f0c8d6/24918577743.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/bharti_axa_life_insurance_cdf_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/81567852173.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/10241092246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc856916-612c-4963-a3fe-2d30a3109ba8/paper_towers_that_can_hold.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/nenezopojizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1856c99c-2cd2-4c51-87d0-c83e0416b59f/40455102911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429348aa-0ac3-4087-9b90-5e0cb206b645/35918488851.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_off0000d0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CE 5224 bytes
SHA-256: 9b2c590c0e18566a67f21672a5dddf8c6ecf578244a41827575bb550235288b3
font_01_sfnt_off0000e288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE288 10620 bytes
SHA-256: a7f5b86ff05f6d8f88422492ac185f2b7e850cc6e56aeef4aee3483916d9d860

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