Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ff29202456c4f9…

MALICIOUS

PDF

68.1 KB Created: 2020-12-18 08:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: df46b53b159d1a09b12036155b1cadf1 SHA-1: b84f19a50448a02e2baf7031c4209127c91d15d7 SHA-256: 17ff29202456c4f95634b7c37f5633f19cfbb23539c731b577794ddaba51bc6c
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=unit+8+level+e+vocab+answers+synonyms PDF link annotation
    • https://vipefujalebir.weebly.com/uploads/1/3/4/7/134744486/posabuxowujonu-fejozumisi.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/ronununase.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/9101618.pdfIn PDF document text
    • https://gufubavofunopi.weebly.com/uploads/1/3/4/7/134704705/lisibulodimejakegoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5eb64e98326c02082010/1606377143206/everstar_air_conditioner_model_mpm-08cr-bb4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fed7f3a-eaf1-402e-a8e2-a3f19a9e0af6/monterey_college_of_law_academic_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/65342627877.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28f8b40f1034a5cb380cb/t/5fcce57ed336b863f0c26579/1607263616523/how_to_see_hashtags_on_instagram_stories.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5da11972c46e3c96414f/1606376866402/falekoborab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d5904f5-d189-447e-87f6-b9e3e78236b9/coleman_air_compressor_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc36d7a0-4af0-4725-aa54-cdf22b4bde82/vareve.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/52688955754.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/number_6_in_recycling_for_styrofoam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c36843d7-f1bc-466d-88dc-38359e857c8f/kefetololenel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9df05a9-2a25-493a-bd16-0f787f144c8a/rekewomida.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_off0000cd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5C 5524 bytes
SHA-256: c63419a79f04a8a615cd46f66399c4b4df7f7e7efe544c09171cceaee48865b5
font_01_sfnt_off0000e029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE029 10872 bytes
SHA-256: b088f53a9aade3a72ba15c2094907cc637744db3643ad1e9bc55057a1dad3e1e

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