Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb3897dc1daa67b…

MALICIOUS

PDF

75.1 KB Created: 2021-05-02 08:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6ff00f32bcc6ad911c4102bcea24902 SHA-1: 42a3947e7d552c4748198dd5c10261175dd3a7bc SHA-256: bfb3897dc1daa67b270d0e43f0f0df0fc2e538ccf24695bf57bea8bc1d077369
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An embedded URI points to a suspicious domain, likely intended to host a phishing page or download further malware. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/strik?utm_term=how+to+use+schumacher+15a+battery+charger
    • http://disozire.mygamesonline.org/roxewusigifapefazokupasa.pdf
    • http://kvyovk.xyz/free_movies_sites_malayalamqs32s.pdf
    • http://jusoxuz.iblogger.org/mojizojuped.pdf
    • http://ketoxitigojaluk.sportsontheweb.net/63663324442.pdf
    • http://rewita.fun/lijidugikitepqu8yo.pdf
    • http://lobabinuladeri.medianewsonline.com/naligibarubuvopatejilim.pdf
    • http://bioforcecolumbia.site/bodapuduwkrqp.pdf
    • http://usersdeviceprotectionservice.site/renuxalegedawetulezijxmeh7.pdf
    • http://s7hmus.org/harmony_650_instructions0vja0.pdf
    • http://rosirodefi.iblogger.org/36335980259.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wevevaviz.epizy.com/netgear_router_wnr3500_manual.pdf
    • https://uploads.strikinglycdn.com/files/c8ee917c-498b-47d9-a922-dff19531740c/kerazugujowikokikirezuna.pdf
    • https://s3.amazonaws.com/tafogusegabomu/4292319374.pdf
    • https://uploads.strikinglycdn.com/files/88079d5c-dab0-45ab-a412-13a3725b0081/44463692657.pdf
    • http://setovoj.onlinewebshop.net/diririlajegojinizude.pdf
    • https://s3.amazonaws.com/limepusotanal/ripukijifusalixiregaw.pdf
    • http://vuloroluget.rf.gd/266365139.pdf
    • http://bezepegu.epizy.com/kapakezus.pdf
    • http://bejanifezilo.atwebpages.com/6152139148.pdf
    • http://tufebogepamik.rf.gd/job_interview_ppt_template.pdf
    • https://uploads.strikinglycdn.com/files/65807017-f578-46b7-bf0d-c8430afabd5e/pellon_808_vs_809.pdf
    • http://fopugaxug.rf.gd/client_invite_letter_template.pdf
    • https://uploads.strikinglycdn.com/files/82c25398-348e-46a8-8672-14c43854d6f8/zugarugarixape.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_off0000e6c3.bin
61f80cf10d3809fe697bcc4dcb3997d37bc9e76149cc83b5835ec6a678415a38
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C3 5652 bytes
font_01_sfnt_off0000f9f4.bin
787a85d3532026d9b239b06827593963e65d44d9b17c7ffaf628440513043832
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F4 10716 bytes