Malicious PDF — malware analysis report

Static analysis result for SHA-256 a873ba5b29f27e8b…

MALICIOUS

PDF

76.6 KB Created: 2021-03-22 01:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d10cca6bf5f4de6b9df8ae9d613307f SHA-1: d326ca101ba47bf8d46219b91163f25901cd9686 SHA-256: a873ba5b29f27e8b9c4b082b3b3366f62914839dcd44f36bc276d631efdd3c83
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, 'resalured.ru', which is likely part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of an external URI in a PDF is a common technique for delivering malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/award?keyword=vata+diet+pdf
    • https://cdn-cms.f-static.net/uploads/4473919/normal_603c1111f24c4.pdf
    • https://static.s123-cdn-static.com/uploads/4475217/normal_5ff06cf334a6f.pdf
    • https://cdn-cms.f-static.net/uploads/4365607/normal_6018e32fdbd68.pdf
    • https://gepekipaw.weebly.com/uploads/1/3/5/3/135304147/rinawuzikejonuwepiwi.pdf
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5fd099c65a5d0.pdf
    • https://static.s123-cdn-static.com/uploads/4464874/normal_5fee481cc6bb6.pdf
    • http://pofuxujeku.iblogger.org/does_peeta_die_in_the_last_hunger_games.pdf
    • http://dipurenirexo.22web.org/91405089524.pdf
    • http://zowifupure.iblogger.org/46125805057.pdf
    • https://sobiwololisa.weebly.com/uploads/1/3/0/9/130969717/rudaga.pdf
    • https://gupapuna.weebly.com/uploads/1/3/4/7/134726568/b1ddc1c2665cf.pdf
    • https://cdn-cms.f-static.net/uploads/4459164/normal_603159c1d0189.pdf
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/3952139.pdf
    • https://static.s123-cdn-static.com/uploads/4368488/normal_5fe065e940d05.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tuzamada/sanuxudigu.pdf
    • http://tabifewegijip.epizy.com/gisuxed.pdf
    • http://bifezuragumizi.rf.gd/bejeweled_3_trainer.pdf
    • http://gisinazujawapub.epizy.com/report_illegal_immigration_uk.pdf
    • http://pusovogubazix.epizy.com/fitevadeli.pdf
    • http://jifusewu.epizy.com/sofiwaxonusufapaxel.pdf
    • https://s3.amazonaws.com/wejuvono/72655189040.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef47.bin
8b37a89bd8c8c7592489ecf75df5c0b2a5bf1de232adc78a02b73cc92d190f22
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF47 4696 bytes
font_01_sfnt_off0000ff61.bin
b4ab561ec2c622cf235ee86c6a9074ee6d8a832ec2479a6ee0e3c151af30cef5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF61 11260 bytes