Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa13c33d174fb195…

MALICIOUS

PDF

69.7 KB Created: 2021-04-05 10:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fafeb346c21e1a15525946e9f94839c0 SHA-1: ec00350417c7503251afd566d175bef74a610c9c SHA-256: aa13c33d174fb1952deb838faa29701aec78e141ff5d2c1c47b900c579e6916e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

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://pelibifir.ru/strik?utm_term=how+to+use+m3+smart+led+unisex+band
    • http://lebedugipul.mywebcommunity.org/textbook_of_medical_biochemistry_download.pdf
    • https://zevakevo.weebly.com/uploads/1/3/5/4/135400716/4b78e.pdf
    • https://cdn.sqhk.co/nifijagik/hjejjia/differentiate_asteroids_meteoroids_and_comets.pdf
    • https://toxofeleziwogiz.weebly.com/uploads/1/3/1/4/131406173/2efdc201.pdf
    • http://fogejebimo.scienceontheweb.net/82670656969.pdf
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/4c962f8b.pdf
    • https://static.s123-cdn-static.com/uploads/4403946/normal_5fcfa77a464c3.pdf
    • https://jefamiwufilidiv.weebly.com/uploads/1/3/1/4/131409158/01ea8840a5.pdf
    • https://cdn-cms.f-static.net/uploads/4498983/normal_601d88b525df9.pdf
    • https://static.s123-cdn-static.com/uploads/4465539/normal_5ff6206954133.pdf
    • https://cdn.sqhk.co/kavatupopum/cjjadie/dipafemekoke.pdf
    • http://tapavinologo.mygamesonline.org/71135180496.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://guminol.epizy.com/63074307068.pdf
    • https://uploads.strikinglycdn.com/files/7aad0875-3b5e-4ab1-af81-2c802258abb9/fozolisejemokogo.pdf
    • http://ziwutaje.epizy.com/68067920096.pdf
    • http://terenido.epizy.com/19053343569.pdf
    • https://uploads.strikinglycdn.com/files/bb8bd7b6-8378-41ee-b7a4-130796f9dec8/razod.pdf
    • http://tapoloferazuziw.atwebpages.com/sojorumof.pdf
    • http://titunika.rf.gd/bbc_live_lounge_covers.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_off0000d317.bin
e9f66c2cf5181d93f6dd75b68419d11d08a5918e8d68b15177bcf95ea2cd27bf
pdf-font-stream PDF embedded font (sfnt) at offset 0xD317 5396 bytes
font_01_sfnt_off0000e563.bin
68283f264b140dd9f634d558577af35dbf1f34ad3810c5d3af0fa31dad7d2037
pdf-font-stream PDF embedded font (sfnt) at offset 0xE563 10736 bytes