Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66033b732cca16f…

MALICIOUS

PDF

73.2 KB Created: 2021-02-20 12:23:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a836f3d33a9b4c4f9d3b861157f5a8aa SHA-1: 4afbda1c883f2dbfab325a0d8b6d91e70a9c030c SHA-256: a66033b732cca16f5d33836f7c1f8206edf1b54c6ede9635ff97637c36da0ed2
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://jottigo.ru/wix?keyword=lirik+lagu+surat+cinta+untuk+starla+versi+perempuan PDF link annotation
    • https://dujezipiver.weebly.com/uploads/1/3/4/6/134610991/2212415.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413867/normal_5fc91c4a37cf8.pdfIn PDF document text
    • http://musc-media.xyz/ruleveludiwesojuk39kog.pdfIn PDF document text
    • http://afracheat1.xyz/163885817868parj.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/viboxikuz/ragnarok_archer_leveling_guide_revo_classic.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/journal_citation_reports_impact_factor.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/update_play_store_terbaru_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/fha_deferred_student_loan_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/ketezoparosed.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/mt_n_makgeolli_brightening_mask_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/gldax_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/caribbean_tv_stations_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/11694030467.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/31875802908.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/22576931288.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/all_the_world_s_a_stage.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_off0000e474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE474 5320 bytes
SHA-256: e51606b510227ca4a7cbe611331321725617285a3e076385bca9afd07b93ba28
font_01_sfnt_off0000f687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF687 9696 bytes
SHA-256: dd180e9f78d025b559105a0d7e36adbcbef6bb80eed0e6ade4008b258e890d99