Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee6ba1171b797a3…

MALICIOUS

PDF

79.4 KB Created: 2021-01-10 18:12:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5153abcfa94990f66a348a0dd73dea31 SHA-1: c780ecd30d6845932f2a85230a131f8f413a1049 SHA-256: 7ee6ba1171b797a383fc5130ebc0374bf2a000bcf825c7370ddb34fee8aeb736
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=vishnu+sahasranamam+telugu+pdf+lyrics PDF link annotation
    • https://nunigatomupava.weebly.com/uploads/1/3/4/3/134314222/pidadiru_zegikelozurepaz.pdfIn PDF document text
    • https://site-1180431.mozfiles.com/files/1180431/2003_chevy_tracker_zr2_owners_manual.pdfIn PDF document text
    • https://site-1173933.mozfiles.com/files/1173933/charm_city_kings_full_movie_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447874/normal_5fb2e62b1d33e.pdfIn PDF document text
    • https://site-1179389.mozfiles.com/files/1179389/51350798630.pdfIn PDF document text
    • https://betetitowuti.weebly.com/uploads/1/3/4/3/134331261/mejilomemite_jujemozazese_zovopuselopaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384144/normal_5fb3eb45d193f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416810/normal_5fe73ff6929e8.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/goviwigax/toturelozoverivuxipijaku.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/depena.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/jejedudewef.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/1538116642.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/template_banner_back_to_school_vector.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_off0000f789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF789 5636 bytes
SHA-256: 38603fa2c297de628749fd66b67a70f5b3bc43b7a3157ddf141e98e764dd37a6
font_01_sfnt_off00010a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9C 12852 bytes
SHA-256: 0d995f3c8ebebadc16462519132dbab40811bcc81e95e230a66cbc0151eef7bf

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