Malicious PDF — malware analysis report

Static analysis result for SHA-256 c466edbc3aff6741…

MALICIOUS

PDF

63.9 KB Created: 2020-11-11 00:56:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3876c8000774b58c2c896b6b45aceaad SHA-1: 124aaac091937ed11c4ee79edf75587dc256b759 SHA-256: c466edbc3aff674133ecc1db0125d06c81f0cf83387f699eda0ffb2db555e01f
156 Risk Score

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-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://traffnew.ru/aws?keyword=walmart+roblox+e+cards PDF link annotation
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/36c49.pdfIn PDF document text
    • https://juzugimigiroteg.weebly.com/uploads/1/3/2/3/132302883/wuronibafow.pdfIn PDF document text
    • https://tusefekojeseto.weebly.com/uploads/1/3/4/4/134437698/3e8038f30.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/8152184.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/9756244.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/lodafigufe.pdfIn PDF document text
    • https://s3.amazonaws.com/rekibedafowow/birds_with_long_beaks_in_wisconsin.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/97771243698.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/untethered_soul_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/campfire_songbook_with_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/dmv_miami_gardens_fl.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/the_cardinal_golf_course_nc.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/repute.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/bowugefejuvokaxijobapo.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_off0000af5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF5D 4940 bytes
SHA-256: c6e1dd59523d94f30437fddcaed4624081277ce1585fe5bb6b9064074b5e9e19
font_01_sfnt_off0000c033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC033 10380 bytes
SHA-256: 46be7ebbf28842d410db388ae298799c653aedce018b4eb036ce8cc4da091f36
font_02_sfnt_off0000e36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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