Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2dc022ea20120c…

MALICIOUS

PDF

77.6 KB Created: 2021-03-31 12:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b881c65c1f64a003e23269f62a49d72 SHA-1: be6c858762e4453cc0282c00e3adfc0e2d9a7de8 SHA-256: ca2dc022ea20120c19cdf92f0180300d9f62690ae6c65c9df4ebe85ecc21cb1e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many of which point to PDFs, suggesting a link farm or redirection mechanism. The primary external URI points to a site that appears to be a lure for phishing or malware distribution. No scripts were extracted, but the PDF structure and link farm behavior are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/wix?keyword=rockwell+model+6+jointer+37-608+manual
    • https://xuvupidorok.weebly.com/uploads/1/3/1/4/131407629/loxoja-dadazilenef.pdf
    • https://feposogasutam.weebly.com/uploads/1/3/1/3/131384530/kaxag.pdf
    • http://gafuvufafokujop.sportsontheweb.net/l_accord_des_adjectifs_de_couleur_exercices.pdf
    • https://torurukiruxo.weebly.com/uploads/1/3/4/5/134529807/1191209.pdf
    • http://liwitesuzemumex.sportsontheweb.net/download_bnf_75.pdf
    • http://govuled.mywebcommunity.org/mexarolen.pdf
    • https://besekexedonake.weebly.com/uploads/1/3/2/7/132741764/fibezigigodako_kelegosef.pdf
    • https://sivavodafewe.weebly.com/uploads/1/3/4/4/134484486/7391312.pdf
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/4737430.pdf
    • https://vejilete.weebly.com/uploads/1/3/5/3/135312445/7299341.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wuwedilejom.myartsonline.com/66848215201.pdf
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_05db1b4b948943cdb220bd22930fb721.pdf?index=true
    • https://s3.amazonaws.com/sowewazulejewi/bapetamerosefojo.pdf
    • https://e37fb4d6-fac4-4cb1-96d9-cce2dae532e5.filesusr.com/ugd/ed2751_c7912143aef346ec9df3d46396f6f25d.pdf?index=true
    • https://s3.amazonaws.com/wutezigojuxi/58305758647.pdf
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_05c14896b3384ad79f67cb79989c6689.pdf?index=true
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_30868d94a2ef41a88b68e2c2a5372219.pdf?index=true
    • http://bebovufuvuji.myartsonline.com/lorabudoxaminum.pdf
    • https://8c330184-3457-40de-b162-e34763a77ed1.filesusr.com/ugd/0aae61_2bf7fd648b3648ceb533274d7aeb41b7.pdf?index=true
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_4f3278b248214a31adbb1fd70245c371.pdf?index=true
    • https://s3.amazonaws.com/safenalavojuwu/fanejimazewufopapuxikaj.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_off0000eda3.bin
b72274e8ce4e978042d49b3aadd74c666e1b4b852d4f301a60c90ed26fa55dfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA3 5912 bytes
font_01_sfnt_off000101d4.bin
405f0b51298cf7e914ed0726c70d4063180b8eb13f75951428b3fec146c3b8d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D4 11508 bytes

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