Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56f1d3300f5f0e9…

MALICIOUS

PDF

75.6 KB Created: 2021-02-19 13:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 24cc4c5f616a16b578675d1851805af1 SHA-1: fd6efbc5fe883b72fb1e59b7cac407410e0bd03c SHA-256: c56f1d3300f5f0e9d45d403e334432bea1f0563c02e0ff396b569c22438d5d26
196 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
  • 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://leonvi.ru/strik?utm_term=zonal+cavity+method+calculator PDF link annotation
    • https://deremufirig.weebly.com/uploads/1/3/4/8/134854029/sufakarok.pdfIn PDF document text
    • http://jakartapro.xyz/bizipanatodefogi48gxs.pdfIn PDF document text
    • http://tomandbxof.site/get_followers_up_on_instagramaqthh.pdfIn PDF document text
    • https://guxovixig.weebly.com/uploads/1/3/5/3/135317997/japudanotaxafuf.pdfIn PDF document text
    • https://vopukuno.weebly.com/uploads/1/3/1/3/131383764/3951092.pdfIn PDF document text
    • https://jewizebalize.weebly.com/uploads/1/3/4/6/134618682/914ac856c26.pdfIn PDF document text
    • http://123dutch.com/loft_bed_plans2ov91.pdfIn PDF document text
    • https://pakefipeve.weebly.com/uploads/1/3/4/0/134017053/wemufefexe.pdfIn PDF document text
    • http://teasmall.space/guidelines_contrast_induced_nephropathyrbs4t.pdfIn PDF document text
    • http://govnososal.xyz/whatever_happened_to_michael_from_the_blind_sidey6faz.pdfIn PDF document text
    • https://mizunemaki.weebly.com/uploads/1/3/4/8/134850414/semito.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/jenisozazewubo/flywheel_energy_storage_design.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/paxesuneverivegobupa.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/driver_hp_m402dne.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/chest_workout_exercises_video.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_off0000eaf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF8 5120 bytes
SHA-256: 18f0008f0d0e19ea6ad52eb08c18b00d7c6f8e37a8ec83502a10f7359303b103
font_01_sfnt_off0000fc44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC44 10944 bytes
SHA-256: 3a5463ae602e53a514577403d6edbd2925720bb0b5dbed680cd5ca60e52f151c