Malicious PDF — malware analysis report

Static analysis result for SHA-256 314ebff5fbc6f036…

MALICIOUS

PDF

79.7 KB Created: 2021-03-19 21:25:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d885ea12512f69101e7e4ceb5288ab63 SHA-1: aebd97931621b8ed2479d8b1c2b139f3f6934a51 SHA-256: 314ebff5fbc6f03691e776dc83f51bd30c070c382e96ed34a8771d4e67494f64
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, indicative of a phishing or link farm campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/123?utm_term=cat+and+lady+meme+template PDF link annotation
    • http://moymagazin.xyz/wejuxafujurumejitiylgh2.pdfIn PDF document text
    • http://sodahq.club/1997_club_car_repair_manual_free_download8p19r.pdfIn PDF document text
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/gonefexugilad_lumawexezowu.pdfIn PDF document text
    • https://cdn.sqhk.co/dolubivo/ggnXVji/cbs_sports_franchise_football_hack.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/2277059.pdfIn PDF document text
    • https://cdn.sqhk.co/xaduwudixum/jfhgebf/groupme_app_download_mac.pdfIn PDF document text
    • http://fsbsiod.com/12988377877dqz55.pdfIn PDF document text
    • https://bufasijo.weebly.com/uploads/1/3/2/7/132740378/8606085.pdfIn PDF document text
    • http://yachts-4-sale.com/karen_c_timberlake_chemistryrzwlf.pdfIn PDF document text
    • https://ruvawuwejijexut.weebly.com/uploads/1/3/0/8/130814193/jezulevapu.pdfIn PDF document text
    • http://koteyarn.moscow/50226864735d4t8p.pdfIn PDF document text
    • https://cdn.sqhk.co/jezofadu/ahh4hdz/14298058182.pdfIn PDF document text
    • https://binoxumo.weebly.com/uploads/1/3/1/4/131452823/nesifesase-golivisasupuja-zotek-xepuwefugow.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/tofizo/88892086130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58885fa9-7a9f-45eb-83f5-1b0852657ea6/luxelapimulabovabasolimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba8f1eb1-6f3b-482c-b08f-2f314ca028c8/51823515433.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/what_is_performance_attribution_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc93c6f1-9e96-4462-a3d3-9c099a71599e/safeline_metal_detector.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/danugazurujuvajuzekef.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/nonubabedujiluzijufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c2651f-8e11-4c35-b920-a8b4caf41afb/jefawabexamipobodebub.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_off0000edec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEC 4588 bytes
SHA-256: 991f22a85132718ea53e1663983aeb5c715c6ff59266b09b851ff9b8add685e4
font_01_sfnt_off0000fd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD73 11208 bytes
SHA-256: a1dd0c329ac366a2dd9bd9636991b429bbccc12a9e37538abd1def5d9d7d8d31
font_02_sfnt_off00012389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12389 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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