Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02915e7a05403eb…

MALICIOUS

PDF

68.4 KB Created: 2021-04-13 21:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3492a0057446bd1b40aa818d7907e25c SHA-1: 946281e640e7ff8acf38c0077807567118e299c5 SHA-256: e02915e7a05403eb8efb4880a00c05fa27765b322512337026c8a5d81e2cd9bf
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary suspicious URL pointing to 'resalured.ru'. Heuristics indicate this PDF is a link farm designed to redirect users, and ClamAV detection confirms it as a phishing/trojan. The ML classifier also strongly flagged it as malicious. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://resalured.ru/strik?utm_term=alcatel+cell+phone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469630/normal_60508d4cee8fa.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/psychology_facts_download.pdfIn PDF document text
    • http://sukuwodexi.scienceontheweb.net/19794746768.pdfIn PDF document text
    • https://livubefelamujir.weebly.com/uploads/1/3/4/8/134899239/5797120.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/the_holy_science_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415754/normal_60074d16c6744.pdfIn PDF document text
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/zatunafofiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_6017172ba666a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417314/normal_604f34435754d.pdfIn PDF document text
    • https://soxigirotum.weebly.com/uploads/1/3/0/9/130969819/fefafuzamavalof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480743/normal_6028157a671e1.pdfIn PDF document text
    • http://beduzevitugok.mypressonline.com/fixisa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fegopebofid.epizy.com/jopubapiruga.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/30673398424.pdfIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/bluebeam_revu_training.pdfIn PDF document text
    • http://gixufedexakav.atwebpages.com/mathematical_physics_by_arfken_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/73713009355.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/hit_album_odia_song.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/71538003922.pdfIn PDF document text
    • http://lumigetutiburu.epizy.com/29617212974.pdfIn PDF document text
    • http://foraxevub.rf.gd/skyrim_jaysus_swords_locations.pdfIn PDF document text
    • http://gamodopa.rf.gd/goxapu.pdfIn PDF document text
    • http://jetotajasavesi.atwebpages.com/financial_functions_in_excel_2020.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_off0000d3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F4 4736 bytes
SHA-256: 8c6d9ab077f56cce624f09d6504dbed357b101922d6b80ec3296398a6fee76f9
font_01_sfnt_off0000e40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40E 9860 bytes
SHA-256: 6377c5354a32a1fea5397f3953415083003004ebd76f397d4b75a17ab2b26c77

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