Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0e04d792a5ad38f…

MALICIOUS

PDF

63.1 KB Created: 2020-11-24 07:58:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f35d5bbb7bcf4ce005481408e8980438 SHA-1: e88434901b2082a222e9c5143ca2456445fb6e91 SHA-256: b0e04d792a5ad38f902593d5b0a4981664b886aa6c10c21597a877a6a3c14318
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains heuristics indicating it is a phishing lure and a link farm, with a critical ClamAV detection for Pdf.Phishing.Trojan. The embedded URL and the document body suggest a social engineering attempt to trick users into clicking a link, likely for phishing or malware distribution. The presence of external links and the ML classification further support a malicious intent.

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://traffnew.ru/123?utm_term=stand+by+me+lyrics+and+chords+mickey+gilley PDF link annotation
    • https://mijunijaxi.weebly.com/uploads/1/3/4/8/134865270/xetobubib.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/producer_surplus_is_the_difference_between_the_maximum_prices.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/99840252882.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/top_website_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/kinematics_equations_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/the_human_menstrual_cycle_lab_31_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37cbe49b-3e71-4eb2-a3ff-d62363e95d0e/50726916717.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/lapemudawatozorobepa.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/programa_de_auditoria_administrativa.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/pudozevixorumisoxux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/838e7320-ea4c-4aa5-8d39-66c8d876acee/pedomakevida.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/t300_key_programmer_manual.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_off0000b920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB920 5764 bytes
SHA-256: 058c692b99474f2d343917b04618354b3c965e21eb7eb72e872e6026247ebc1c
font_01_sfnt_off0000cc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC97 10180 bytes
SHA-256: 0e2790bd7dc7fd7a0852e0cea1a73f13a1078edf7b87ec256a3b6e9119aa833a