Malicious PDF — malware analysis report

Static analysis result for SHA-256 b84bd16577e27f0e…

MALICIOUS

PDF

79.2 KB Created: 2021-02-22 06:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 7811e3e4944592d3b0b7b6a6da48b553 SHA-1: e418a4a83fe7412225a954e185155760ce1a9bcb SHA-256: b84bd16577e27f0eb11671893bd04b6bf7f7ede1f49ed7566a77fa97eefe71b9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, contains text related to a coffee maker issue, serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=bella+pro+series+coffee+maker+not+working PDF link annotation
    • https://cdn.sqhk.co/kewixoretuze/pt8hbid/73923060180.pdfIn PDF document text
    • https://cdn.sqhk.co/zofukumane/TVSbwgf/jiffy_lube_chicago_illinois.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxevabuvix/gfmgil9/vikirolojozezutunile.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379971/normal_5fce3684b8bc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413113/normal_60320059a7f19.pdfIn PDF document text
    • http://reactivaperu-viabcpi.com/daxibejogonerawakenuoifpe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470679/normal_6008e013015c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_600d50844b11a.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/gflhchc/dragon_drilling_ltd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_602194fe8d9f3.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/zdifhjQ/36671078731.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/PjbmheO/sunday_school_object_lessons_on_prayer.pdfIn PDF document text
    • http://talkme-news.info/67932455325qc3ty.pdfIn PDF document text
    • http://neyroskakalka.site/summertime_saga_eve_guide7fn3m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377928/normal_5fcf44b79935f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370791/normal_5ff50b937d05c.pdfIn PDF document text
    • https://cdn.sqhk.co/xumelesep/jAMgjij/outbreak_company_light_novel_epub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_60307b9d35518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368229/normal_6033247665d49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_5fd35007d5a07.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83E 5540 bytes
SHA-256: 9baaaf4edf76ab0000808d046ee2c8bdd9cad0d89db72c8c3979c7395a172049
font_01_sfnt_off00010b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1D 10560 bytes
SHA-256: e29bb2110d1a4566ef900302537f0794a22b3c8aba1709b936ebb5aded12975a

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