Malicious PDF — malware analysis report

Static analysis result for SHA-256 049845aa53d8d2e9…

MALICIOUS

PDF

72.2 KB Created: 2021-02-10 02:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 718b82ad62447ace711b182d16b28726 SHA-1: dafbd5d47a7e0ac2aab33bb0c2a478ce88614e07 SHA-256: 049845aa53d8d2e9a067b571953dce01c712cde22018dc8da789a8836665ae17
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, identified by heuristics as a potential phishing or malicious lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'size guide', suggesting a social engineering pretext to drive users to the external URL.

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://bologen.ru/aws?utm_term=crocs+malaysia+size+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452377/normal_60130af4952d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446649/normal_5fc6170900dec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418188/normal_601ee92c0e4bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480414/normal_5fcb372fa6c67.pdfIn PDF document text
    • http://rotixumuzu.22web.org/76828854434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501789/normal_5fd9135e9f6ec.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/xozeb/ganesh_bhajan_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/94236460106.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/degusupozunuraxejemaruxe.pdfIn PDF document text
    • http://zoridod.epizy.com/89172443803.pdfIn PDF document text
    • http://wafazitowem.rf.gd/63021992838.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/44656837174.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/aakasha_ganga_malayalam_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/xisimilasudareselivosig.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/autocad_free_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/louisiana_earned_income_credit_worksheet_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/xabosimatalujizopemil.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/lowest_common_multiple_worksheet_tes.pdfIn PDF document text
    • http://fibejebovef.epizy.com/lokirejapuxewap.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_off0000cf45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF45 5128 bytes
SHA-256: ce247c937ae51a9b8de3ce21003191520f0e032cc532c521bd23cdff357d7f5a
font_01_sfnt_off0000e0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B4 10708 bytes
SHA-256: 9f2e5bc5be38452352bff15ef138965b98e5a5077f81b69b97606e88a1f32217
font_02_sfnt_off00010571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10571 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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