Malicious PDF — malware analysis report

Static analysis result for SHA-256 10cdb6cc823b111f…

MALICIOUS

PDF

69.6 KB Created: 2021-03-04 08:26:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c123d5cb089d893e2c87b131927f1f05 SHA-1: 46d129daf678c1745ba73c53014e4e32237d3076 SHA-256: 10cdb6cc823b111fa7488863b94e0b42cd5435beca2a8dfdbc865cb816346f27
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://xezojetit.ru/wix?keyword=elliptical+rcp+pipe+dimensions PDF link annotation
    • https://bukusafirede.weebly.com/uploads/1/3/4/2/134266240/bomulapa-domob-tukiduditajozus.pdfIn PDF document text
    • https://cdn.sqhk.co/rafumufo/geIO7gd/76330071062.pdfIn PDF document text
    • https://cdn.sqhk.co/besudamuge/jahigdM/migafe.pdfIn PDF document text
    • http://benovezim.22web.org/38124054029.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/vFieyic/kiseziloxe.pdfIn PDF document text
    • https://lumovomudin.weebly.com/uploads/1/3/4/7/134704265/tufegekap-wekekozalo-moturaris.pdfIn PDF document text
    • https://sumiloruxefeme.weebly.com/uploads/1/3/2/8/132814276/pawawujuwotegevemawi.pdfIn PDF document text
    • https://zewelujipe.weebly.com/uploads/1/3/4/8/134846298/kerik.pdfIn PDF document text
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/d56693.pdfIn PDF document text
    • https://jexedijelewa.weebly.com/uploads/1/3/4/5/134518212/vurirudaze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vososasoxumete/siwakijodifosenatotujoxux.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/49068711466.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/25412405577.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/taxi_driver_n_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/tree_branch_picture_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DF 4964 bytes
SHA-256: 6fdda4f850bd80290f1177ff511a1358c9ecbf5dee032d1e8f39a000e30f5728
font_01_sfnt_off0000d89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89A 10216 bytes
SHA-256: ef852be5bb55da0b300ebe5fd44ace89b4b3ef1b16cc486d3351128339d3beae
font_02_sfnt_off0000fb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c