Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e704a1cab2c7d9…

MALICIOUS

PDF

76.6 KB Created: 2021-04-19 18:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b80c02d299eca894b50ddd9ba28d443 SHA-1: ed4aa448302c6c7223c2029beeb395a7ef3440ed SHA-256: e0e704a1cab2c7d908ccbf65b736cb6a09fe9d7e5be7e0263f1064894707f7c6
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though partially corrupted, contains text related to thermostat replacement, suggesting a lure. Embedded URLs, such as 'https://bologen.ru/strik?utm_term=how+to+replace+a+honeywell+thermostat+with+a+nest', likely lead to malicious sites designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=how+to+replace+a+honeywell+thermostat+with+a+nest
    • http://dorugatutaxovi.scienceontheweb.net/pejokiguxapawagifaber.pdf
    • http://likefetevu.getenjoyment.net/53769133807.pdf
    • https://static.s123-cdn-static.com/uploads/4374371/normal_5ffb0ba3d7953.pdf
    • http://qwertyujg.xyz/khutbah_al_haajahl1ndb.pdf
    • http://sivesesugipode.scienceontheweb.net/70808098140.pdf
    • https://static.s123-cdn-static.com/uploads/4365536/normal_5ff53f0642bf4.pdf
    • http://meetcabinets.xyz/50593948043g8kro.pdf
    • http://normab-id.com/is_push_pull_legs_better_than_bro_split_for_masspr0ug.pdf
    • https://cdn-cms.f-static.net/uploads/4495040/normal_6037a112419ff.pdf
    • http://agent-spv.space/apologize_one_republic_piano_sheetsupsim.pdf
    • http://premial.su/wazomamukenogipefubezufsfyb3.pdf
    • http://ranupila.mywebcommunity.org/causes_of_prostate_cancer.pdf
    • http://towufato.mywebcommunity.org/academic_literacy_test.pdf
    • http://dalifajebuxog.scienceontheweb.net/dremel_accessories_guide_poster.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wadobenozunon.rf.gd/voguvepubuserogowajuloja.pdf
    • http://molodetagako.epizy.com/bed_bug_reports_hotels_chicago.pdf
    • http://ziwivazud.onlinewebshop.net/1419666574.pdf
    • http://rupesujutiwu.myartsonline.com/bamexewasexeladalogusev.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_off0000ef36.bin
f75eacd582d61d50be71781073c3d0b5c73e30912d60742e581a356eaa764cd6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF36 5328 bytes
font_01_sfnt_off0001013c.bin
244130dd5c59e466b6150eed31ad74663929a9fd6baa0e73947017c25201ad43
pdf-font-stream PDF embedded font (sfnt) at offset 0x1013C 10492 bytes