Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a2a9a8e9736470…

MALICIOUS

PDF

65.7 KB Created: 2020-11-19 20:02:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fcb66dc4f2f1ba9c33bd6f040238b829 SHA-1: be638c659bd5021a1b6bf7996988a5807d00ed10 SHA-256: 46a2a9a8e9736470f6ae9842cdaf166d44480aa002183ea3f0b973b75a5bda9b
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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/strik?utm_term=final+fantasy+tactics+propositions In PDF document text
    • https://mefogogid.weebly.com/uploads/1/3/4/6/134600117/koganumugodag.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/nubijixafu-rimidoleg.pdfIn PDF document text
    • https://mixekolasum.weebly.com/uploads/1/3/4/3/134388380/c4a2ff60f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5fa8303204b96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407795/normal_5f96c715ce337.pdfIn PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/8edd55e46f4b.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/generanufadipo.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/juvuxisodo.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/sugowubuf/10051049724.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/berg_balance_scale_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/susan_albers_mindful_eating.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/retalixizizave.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/19381122812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c4e4bfa-a538-4e92-a7f9-1d02d32dce33/living_environment_lab_human_fetal_growth_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c8591f9-e4f9-4711-bad3-980d37b28557/25846151238.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_off0000c530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC530 5068 bytes
SHA-256: b9f976ccfed4e05147284a3c928ddeb5f50b8f683f72a2c454582cd84b453e44
font_01_sfnt_off0000d68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68D 10320 bytes
SHA-256: 09069f9407dae248aafbbd96587d92c11a8e23bad65cdc4bb3b33d928650c40e

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