Malicious PDF — malware analysis report

Static analysis result for SHA-256 af926eef8a847c94…

MALICIOUS

PDF

71.4 KB Created: 2021-02-22 02:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 01da8b8edfe417cd877cafbc279f9fc1 SHA-1: b05a256b0792645bbbc07827e1f1c5e3f4383803 SHA-256: af926eef8a847c948141845b4f6a91f0f9df3c194255f022d07a51df3f09edbf
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=gpxplus+sign+up PDF link annotation
    • http://fudasoba.iblogger.org/poxazexelu.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/jufaruxejikejizidard1t98.pdfIn PDF document text
    • http://dabuxupufudina.22web.org/quantitative_research_about_academic_performance.pdfIn PDF document text
    • https://lodipopigib.weebly.com/uploads/1/3/1/8/131857338/susomil.pdfIn PDF document text
    • https://raponomipa.weebly.com/uploads/1/3/2/6/132681826/sometudasu.pdfIn PDF document text
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/3256037.pdfIn PDF document text
    • https://toxodomof.weebly.com/uploads/1/3/1/3/131384531/duwodunepe_kolewave_sibazipokojagox_zalevuw.pdfIn PDF document text
    • http://nemeloru.66ghz.com/josanodajimu.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/verirejon/nfl_confidence_pool_picks_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/diabetic_foot_osteomyelitis_guidelines.pdfIn PDF document text
    • http://lilivuxaja.rf.gd/lagu_bossanova_jawa_vol_1.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/come_on_get_happy_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/96877750905.pdfIn PDF document text
    • http://kazixovo.rf.gd/16654638692.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/19580349751.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/fall_baby_shower_invitations_templates_editable.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_off0000dea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA0 4780 bytes
SHA-256: 2da29648cb7b59314fde95955f0ed95ce9cfafc8b474c4cd4f8e78c9a2502b05
font_01_sfnt_off0000ef06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF06 10012 bytes
SHA-256: 5ecf4d7fc4ee7dd97f7e7620c676b67995e181638e31eb3c943b9776e6ee5bb9