Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3ca2dfd030223e…

MALICIOUS

PDF

66.9 KB Created: 2021-02-15 21:11:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4bcbbaa6f4fa3e1f6cd2173d8fb8b369 SHA-1: 609bf2cf468771b1941bcc585db489ff876b3c40 SHA-256: 9d3ca2dfd030223e777f3571b600e7067d9c1c0bb80ffcce56d47cb683d380de
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://bologen.ru/wix?keyword=fundamentals+of+the+faith+peter+kreeft+pdf PDF link annotation
    • https://fonabanobegax.weebly.com/uploads/1/3/1/6/131636781/dabejezolow-refazipelegapis.pdfIn PDF document text
    • https://wepidunobon.weebly.com/uploads/1/3/1/4/131452842/03796ed1df7.pdfIn PDF document text
    • http://pusaburuku.22web.org/mulejenanutazidaro.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/jjMthHU/xagigo.pdfIn PDF document text
    • https://masizomomom.weebly.com/uploads/1/3/2/6/132681315/jubukasek.pdfIn PDF document text
    • https://vifewilepame.weebly.com/uploads/1/3/4/0/134012930/4521960.pdfIn PDF document text
    • https://turakenedonatup.weebly.com/uploads/1/3/4/6/134610331/df74b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laxaguwen.epizy.com/17080210359.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/kuzukobigekolovafepuda.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/83931652117.pdfIn PDF document text
    • http://pijutisiguzog.rf.gd/rokomexelunadopaxizale.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/mindtap_microeconomics_answers_chapter_16.pdfIn PDF document text
    • http://xoroniwogogo.rf.gd/masevevag.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/27902607751.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_off0000cb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB81 5300 bytes
SHA-256: 1c1d1af44f4c61de8da1f0099417e9f594b3f204c829a042a74d9ec01e5aca76
font_01_sfnt_off0000dd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD60 9832 bytes
SHA-256: 96c42282d682401da139b3788fff776774edf4f48cde2d7d818d7b92242274a0