Malicious PDF — malware analysis report

Static analysis result for SHA-256 327490fa50004ac5…

MALICIOUS

PDF

87.5 KB Created: 2021-03-22 00:27:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64ea30bd3f633c40d81e846dbfe4a4e3 SHA-1: 547eee407ed1a8e619af504a31550c86393dae6a SHA-256: 327490fa50004ac5235922648c169a9e66dbfe4d1b9b74703c1f0576c9996ed2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one prominent link pointing to a suspicious domain ('resalured.ru') that is likely used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, aligning with a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/123?utm_term=annuity+and+perpetuity+pdf
    • http://xezakekefeba.iblogger.org/61654400804.pdf
    • https://cdn.sqhk.co/bapuxilav/pkigibn/77195989116.pdf
    • https://dawejufajipamoz.weebly.com/uploads/1/3/5/3/135350304/mexutidujekove.pdf
    • https://rubosesizip.weebly.com/uploads/1/3/4/7/134744628/5436371.pdf
    • https://kegovivaxik.weebly.com/uploads/1/3/4/5/134506491/borigenu_suboninamozifip.pdf
    • http://jelabenix.22web.org/71567347944.pdf
    • https://cdn.sqhk.co/gaxokakijefe/0hihjSS/hockeytvaan_vastra_b_20_21.pdf
    • http://puxeguka.iblogger.org/guideway_care_jobs.pdf
    • https://bowutemol.weebly.com/uploads/1/3/4/2/134234741/1365328.pdf
    • http://xojokare.iblogger.org/phone_ringtone_appa.pdf
    • https://fekawuzode.weebly.com/uploads/1/3/5/9/135993312/4336454.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sixolose/colonial_of_zeeland_grandmother_clock.pdf
    • https://s3.amazonaws.com/fadupazageraf/nuzufozivadi.pdf
    • https://s3.amazonaws.com/kulinisokakewi/sobifanurutawelom.pdf
    • https://s3.amazonaws.com/wiremeresegikon/nafawaf.pdf
    • https://s3.amazonaws.com/lukepepe/zixomabajikukobuxuduxeg.pdf
    • https://s3.amazonaws.com/kulinisokakewi/24765668056.pdf
    • https://uploads.strikinglycdn.com/files/cbce6b54-7efb-45ac-a2a2-68654aa64ed8/samsung_rf268abrs_parts.pdf
    • https://s3.amazonaws.com/libusamagowuvo/silver_wedding_anniversary_invitation_templates.pdf
    • http://tedizixulore.epizy.com/24852923394.pdf
    • https://s3.amazonaws.com/xewamejixolefaj/dugogebatojalavopaker.pdf
    • https://s3.amazonaws.com/zatasipezeg/samsung_rf263beaesr_aa_door_shelf.pdf
    • https://uploads.strikinglycdn.com/files/23734209-caa2-47d5-adf4-592e44407e82/philip_kotler_marketing_management_16th_edition.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011848.bin
18f39f6689544b22552efd0767cedc504f9d1b7c7c713be50f20897af49a79d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11848 4916 bytes
font_01_sfnt_off00012922.bin
12d9d4e396da70deeacefe13e4d8141a07016d4098b80a22c94d73d9ee6c320d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12922 11608 bytes

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