Malicious PDF — malware analysis report

Static analysis result for SHA-256 47af6f07f38a36c7…

MALICIOUS

PDF

75.1 KB Created: 2021-03-01 01:24:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 30e165d5f6688facc12bf2d207deed33 SHA-1: 6375beef342e614eb9e24cfaafd79c76b79d217d SHA-256: 47af6f07f38a36c7c829cc25df10c169a757d039d0d4ff39c9c73ee8ef39bec2
166 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous external URIs suggest the document is designed to redirect users to potentially harmful websites. The 'SE_LOLBIN_RUN_COMMAND' heuristic firing, while vague, combined with the overall structure, points towards an attempt to execute commands or exploit vulnerabilities, possibly involving JavaScript given the PDF context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/wb?keyword=what%20are%20the%20organizational%20behavior%20issues PDF link annotation
    • http://creditscorerepair.info/assamese_breakup_videoq8bjy.pdfIn PDF document text
    • https://bumokodujexub.weebly.com/uploads/1/3/4/5/134595190/danaripomobefu-zorujitavuraji.pdfIn PDF document text
    • http://jowakemanek.iblogger.org/focusrite_18i20_2nd_gen_specs.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/bupigow.pdfIn PDF document text
    • http://lanejaselisipu.22web.org/loveki.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/zugovifazof.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/my_petsafe_transmitter_keeps_beeping.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/ponusapatimerap.pdfIn PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/bozemixokev-pebavu-visegupivu-jubufipinizo.pdfIn PDF document text
    • http://wupozigujoruzar.22web.org/windows_powershell_scripting_and_toolmaking.pdfIn PDF document text
    • http://fegalaro.iblogger.org/charisma_sheets_at_costco.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogivuwe.onlinewebshop.net/55017754771.pdfIn PDF document text
    • http://lidumadinub.epizy.com/android_studio_change_app_logo.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/stihl_bg86_carb_tuning.pdfIn PDF document text
    • http://danofawo.rf.gd/inquisitive_psychology_answers_chapter_3.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/costco_laptop_dell_precision_m6800_drivers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9F 5208 bytes
SHA-256: 51b920ff675e954db6e75f3e401ff37b37df38ed6c39b4bfc0124368c1bccbd9
font_01_sfnt_off0000fd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6A 9932 bytes
SHA-256: 10095956ecbebe3dcc794109ddc9b104d9198fa775582959fc05f71b676a4a5f

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