Malicious PDF — malware analysis report

Static analysis result for SHA-256 d83c2309f684ede2…

MALICIOUS

PDF

72.8 KB Created: 2021-06-09 01:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2de71b1a5ed64a3d84156f650290e671 SHA-1: ebfe4a06eb61e26281ac14ef3f47455923a4b08d SHA-256: d83c2309f684ede2e288a908cef5a94bc90f8d552a5e992b481204d2bcabdb39
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm designed to distribute malicious content. It contains numerous external links, many pointing to disposable hosting services, and is flagged by ClamAV as Pdf.Phishing.Trojan. The embedded URLs, such as 'https://pistant.ru/pbw?utm_term=wordscapes+cheat+level+3820', likely serve as entry points to further malicious stages or phishing content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pistant.ru/pbw?utm_term=wordscapes+cheat+level+3820 PDF link annotation
    • https://sozufozixukuba.weebly.com/uploads/1/3/4/7/134730132/gonogodufogi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457857/normal_5fcc94ab17abc.pdfIn PDF document text
    • https://julubagarod.weebly.com/uploads/1/3/2/6/132695517/texevu-laruzevo-dakofipuriso-pesesak.pdfIn PDF document text
    • https://xuropowupenuba.weebly.com/uploads/1/3/0/8/130813979/xozef.pdfIn PDF document text
    • https://zerevodajerut.weebly.com/uploads/1/3/4/5/134502997/kelutovowasupil.pdfIn PDF document text
    • https://verefatodefi.weebly.com/uploads/1/3/4/7/134722939/lazifiji.pdfIn PDF document text
    • https://xepezexitig.weebly.com/uploads/1/3/0/9/130969834/fef9d.pdfIn PDF document text
    • https://xubibedizu.weebly.com/uploads/1/3/1/4/131454459/zikupikuzagizo_zeduverafivotat.pdfIn PDF document text
    • https://mejexagisogikez.weebly.com/uploads/1/3/4/4/134468566/petonizesorojitaxixi.pdfIn PDF document text
    • https://bitilidejiv.weebly.com/uploads/1/3/4/4/134442737/e108a2f3bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480755/normal_5fe3b6f6c6a1c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/04fff257-9249-4ec7-801b-09dd0d001b32/powerscore_gmat_reading_comprehension_bible_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/353273bf-5fc4-4aa4-937c-07303d299236/what_brand_is_ilo_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af2a045-d684-43ae-8768-8f59af483509/batman_the_long_halloween_1998.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/f/baudrillard_simulacra_and_simulation_disneyland.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/w/file/fetch/144816090/libro_de_historia_de_mexico_2_grado_de_secundaria_santillana.pdfIn PDF document text
    • http://vakerul.pbworks.com/f/bunesutafotimulalaku.pdfIn PDF document text
    • http://nibokuwogi.pbworks.com/w/file/fetch/144822207/python_programming_language_a_cheat_sheet_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a4e475-ae90-4c55-bddd-07adfa42ac04/vexulimew.pdfIn PDF document text
    • http://redejok.pbworks.com/w/file/fetch/144515685/terraria_map_all_items_1.3.0.7.7.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_off0000de37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE37 5864 bytes
SHA-256: ecd3d520f0a8c568ed40140021a12ed2218f59427621cda63fa072c777efa9e4
font_01_sfnt_off0000f23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23B 10396 bytes
SHA-256: 6f743552d34c48239619233812d2655bc3d5a9ff04930c20398fa79084aa08b9