Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb02951b31124611…

MALICIOUS

PDF

77.1 KB Created: 2021-03-03 00:33:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ba6cca62bcf608a1c1d87e681621c6a8 SHA-1: 70d4702db87cd5a035439c1337177724cd7bd03a SHA-256: cb02951b3112461146831ccc48b7e7f19033d90dcb3110c35e6da111055abab1
104 Risk Score

Malware Insights

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

The sample was flagged by a machine learning classifier and ClamAV as malicious, with heuristics indicating the presence of external URIs and urgency lures. The document body, though heavily obfuscated, contains text related to a factory reset, which is likely a pretext to disguise a phishing or malware download attempt via the embedded URL. No scripts were extracted, but the presence of external links suggests a download or redirection to a malicious site.

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://mezovuduw.ru/award?keyword=how+to+factory+reset+intermec+pm43 PDF link annotation
    • http://pabixigenived.22web.org/fortnite_llama_sheet_cake.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/lafuxezevuwoveboxis.pdfIn PDF document text
    • http://idealica-ituficiale.website/javascript_visual_quickstart_guide_9th_edition_downloaddl7n0.pdfIn PDF document text
    • http://goromeo.club/caracteristicas_biologicas_del_ser_humanowun9d.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/ruin_and_rising_read_online.pdfIn PDF document text
    • http://govazibibili.22web.org/3762667531.pdfIn PDF document text
    • http://moymagazin.xyz/tagedusefapefirajisufozu219pm.pdfIn PDF document text
    • http://stickerrus.ru/love_languages_book_for_couplesvmc9o.pdfIn PDF document text
    • http://tophomework.space/blanch_condensed_light_font_freek4sfn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/taturi/26814219157.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/17005804941.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/big_little_lies_season_2_episode_4_recap_vulture.pdfIn PDF document text
    • http://duximepameme.epizy.com/ludejiwawurififej.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/31667652835.pdfIn PDF document text
    • http://worurekebisur.rf.gd/wenimewifuzuxakuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/2282336460.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_off0000f14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14B 5536 bytes
SHA-256: 24b2b933f246a2d7e53b231c8e96310f77d9a9366823cd1253edec827f71da17
font_01_sfnt_off00010433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10433 10184 bytes
SHA-256: 5e49409c086b9124ef967f58c5623921059a829f7ebd4e65ea2d954d18fb3f8e

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