Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32ad84b8d69cfd5…

MALICIOUS

PDF

132.8 KB Created: 2020-11-26 07:24:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d257a9639f99fe757f70713b59bdceba SHA-1: 901b1ed3d10069635b9a44dc0808408c631b263a SHA-256: b32ad84b8d69cfd560f4452f023c483ab82ddbb49cea6f99033ee141146bb78c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffine.ru/strik?utm_term=khalil+gibran+pdf+deutsch PDF link annotation
    • https://tusemebi.weebly.com/uploads/1/3/4/3/134316443/buxibiva_vutovira_rasenik.pdfIn PDF document text
    • https://senamevab.weebly.com/uploads/1/3/4/6/134689233/251588.pdfIn PDF document text
    • https://bafobuxog.weebly.com/uploads/1/3/4/3/134316473/2d4e727e07.pdfIn PDF document text
    • https://kutowovazamil.weebly.com/uploads/1/3/4/3/134362820/823a07b294c25b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/pakanapagemipamiwizeti.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/misupol.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/akhil_movie_songs_com.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccada168-30c1-4e3e-b976-b6ecc8b495a2/2797568324.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/android_phone_cracked_screen_repair_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/juzuni.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/vugipeg.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/32042922672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ab20a24-7bb3-430d-b8be-3246c12af219/xepifawik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bf25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF25 5524 bytes
SHA-256: e795bdc01c76a04be9947eaac8e452beb94840fae5220f172942517f8fa9e6a9
font_01_sfnt_off0001d1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1EB 12228 bytes
SHA-256: 418d4c5ce8869ad4e4f3ae6d6d56c7ca35624ca760ccc4b5df257d04417499c3
font_02_sfnt_off0001f9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9D9 2908 bytes
SHA-256: b67da6493f3b12e6ef142429c9e520bc410fe517df368f1f20e5da800fda5567

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