Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc95402963bb4f1…

MALICIOUS

PDF

74.4 KB Created: 2021-02-04 18:27:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 20013134934a4db4501a9cb6ff304b86 SHA-1: 5bed6a312616e154ebe135d87f99a30fa1edc5f1 SHA-256: 0bc95402963bb4f12c9e8c46e77b72065f522fed188574d9a6630724babccf3f
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wb?keyword=ielts%20book%2014%20test%202%20listening%20answers PDF link annotation
    • https://dufamapa.weebly.com/uploads/1/3/4/3/134399252/7385447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5fd26c94e41a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365525/normal_5fdee48f2efa1.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/iicHidd/drift_life_speed_no_limits_legends_racing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415291/normal_600fb5aa3839f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477138/normal_5fd2af8e080a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494417/normal_5ff5a3c7396e0.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/yOhcgfB/rilelikutaxaredukaxujafa.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/Viizje4/steel_weight_calculator_i_beam.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/E4gcpii/evostar_legendary_warrior_rpg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zifasodokid.epizy.com/759617961.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/animal_sounds_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/37044833824.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/xekopotixiki.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/kexukiwapojixowomotofu.pdfIn PDF document text
    • http://fibonudonug.epizy.com/katirarele.pdfIn PDF document text
    • http://zalaxorenisev.epizy.com/advanced_aerodynamics.pdfIn PDF document text
    • http://guxenubegipus.epizy.com/71972818339.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_off0000e484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE484 5356 bytes
SHA-256: 7f854f4c71fe4e0fecb23fbcdea6c772241a60dbd77d5ef4034ebbb687587b58
font_01_sfnt_off0000f6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F0 11064 bytes
SHA-256: c4618e50e7f16cdb3c60f7b1725ffdeee475c92d95eff754ec108cb9b4a33c9d

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