Malicious PDF — malware analysis report

Static analysis result for SHA-256 2752d7bb833bde2d…

MALICIOUS

PDF

73.4 KB Created: 2021-03-17 19:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e8511f7a16685009a518fb1abdbf8167 SHA-1: 1f8619c4913645700b5a78efbbbcab6becfd0c3f SHA-256: 2752d7bb833bde2db7e65383ea3e2a0b865e12da69f6a7e0b6e88dd5db76c211
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a coffee maker manual, likely to trick users into clicking malicious links.

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 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://maypoin.ru/wix?keyword=bunn+coffee+maker+model+mcu+manual PDF link annotation
    • https://cdn.sqhk.co/telivagawu/iTAhigf/hockey_prediction_app.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/9njjaig/giant_mountain_bikes_for_sale_ebay.pdfIn PDF document text
    • https://fegoparowewara.weebly.com/uploads/1/3/4/3/134321013/62661be952.pdfIn PDF document text
    • https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/963467ce4.pdfIn PDF document text
    • https://jizidetaji.weebly.com/uploads/1/3/4/6/134626841/6a024.pdfIn PDF document text
    • https://cdn.sqhk.co/pavupaken/0jgjgeE/bucky_s_convenience_stores_houston_tx_77043.pdfIn PDF document text
    • http://alcexpress3.xyz/29142983715y5q4j.pdfIn PDF document text
    • http://educationonline.website/33461224154xby1g.pdfIn PDF document text
    • https://fekalebewobazo.weebly.com/uploads/1/3/4/6/134668576/6805407.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/jgoqJic/run_ninja_run_3_game_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lamuverifob.epizy.com/werawapinadejaxij.pdfIn PDF document text
    • http://pubupamosala.epizy.com/antivirus_for_win_7_32_bit.pdfIn PDF document text
    • http://dotenax.rf.gd/citra_3ds_android_2019_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/27351219120.pdfIn PDF document text
    • http://bifikaximeme.epizy.com/96174513615.pdfIn PDF document text
    • http://daxokefi.epizy.com/senotese.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/sawikain_worksheets_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/banalowadelakidufojeg.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_off0000e1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CA 5104 bytes
SHA-256: 75a2b4c19bfdf7ca4f10c92a9fa655d33f041994bc1e7aca49bf5b8dd6a432b0
font_01_sfnt_off0000f310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF310 11116 bytes
SHA-256: 8d44c0db2449baf5393126074130ba73a23d05bc7cb5645886a3e5128891c8d0

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