Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fa63624a198e93…

MALICIOUS

PDF

66.0 KB Created: 2021-02-13 05:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8f217c70444da9caf427bd2c0175b8ea SHA-1: 27a5bd3ed1ddbc1133ea24872eb58d2def769400 SHA-256: 30fa63624a198e934b8a6adea73b2b99b62720e5c49e30df647905bfcfc35e07
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, characteristic of a link farm designed to obscure the true malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest an attempt to redirect the user to a malicious site, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://druttle.ru/wix?keyword=aha+bls+provider+manual+2017+pdf+free PDF link annotation
    • https://pukuxenusafo.weebly.com/uploads/1/3/4/7/134711282/1022bdaf2524.pdfIn PDF document text
    • https://legaxebojidonet.weebly.com/uploads/1/3/0/7/130775342/banibexugiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391642/normal_600968ae86a16.pdfIn PDF document text
    • http://copyright-help-report.com/77130562373o8pxj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pakewerulawe.rf.gd/41454590500.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/fateduliginezuxejetefiriv.pdfIn PDF document text
    • http://rafesule.rf.gd/duzinefidukodolow.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/aahat_serial_all_episode.pdfIn PDF document text
    • http://magajavopisili.epizy.com/wobapigilumetirabifofige.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/vugafazogutunufited.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/ruwomunumi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000acc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACC9 5876 bytes
SHA-256: 0f55455a94237efc908f30f6183129c45a960f7463e01e4891ffcdc6160fcf81
font_01_sfnt_off0000c0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B0 10320 bytes
SHA-256: 9ecea0ccc37e3322cf9f7248979bda92779fabe805e5d5b142a013ad2cc36a2c
font_02_sfnt_off0000e442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE442 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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