Malicious PDF — malware analysis report

Static analysis result for SHA-256 3114ac23954c5f8a…

MALICIOUS

PDF

100.6 KB Created: 2021-03-22 02:51:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8323b442c056657c804e49377c13b7c SHA-1: bd4c8c82f487046751286a1bb4639153c6bb66b0 SHA-256: 3114ac23954c5f8a435c5fbb9bc2e0a280b49703383e321b5ffdefadef99e2a0
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm designed to redirect users to external websites, with one prominent URL being `https://ponafet.ru/strik?utm_term=epson+workforce+wf-2630+scanner+error+00`. This URL is presented as a search result for printer error information, suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://ponafet.ru/strik?utm_term=epson+workforce+wf-2630+scanner+error+00
    • http://fegiroxopirez.sportsontheweb.net/losapidamukegafuxekuzutij.pdf
    • http://fufulizirexub.22web.org/clearance_king_platform_bed_frame.pdf
    • https://cdn-cms.f-static.net/uploads/4393762/normal_60414c6fe07f4.pdf
    • http://fonareru.22web.org/power_rangers_jungle_fury_camille_transformation.pdf
    • http://geniputan.66ghz.com/los_angeles_rams_injury_report_today.pdf
    • http://nizavevorupuj.mywebcommunity.org/hr54-200_vs_hr54-500.pdf
    • https://static.s123-cdn-static.com/uploads/4381551/normal_5feeed092606b.pdf
    • https://static.s123-cdn-static.com/uploads/4482618/normal_60007c7551368.pdf
    • http://fafikup.scienceontheweb.net/debaj.pdf
    • https://static.s123-cdn-static.com/uploads/4476939/normal_5fe086cbb9b54.pdf
    • http://tavajan.iblogger.org/6628602864.pdf
    • http://menetufebev.22web.org/t_d_s_full_form.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jezobasit/kunkka_combo_guide.pdf
    • http://dowuxufab.epizy.com/bugzilla_tool_tutorial.pdf
    • http://firosuvidafodi.rf.gd/seretazila.pdf
    • http://zikenapija.epizy.com/gumamesi.pdf
    • https://s3.amazonaws.com/fobupojowojon/timalodoxe.pdf
    • http://mudanogepiw.epizy.com/bhartiya_samvidhan_ke_anuched_ka.pdf
    • http://febagilelefejen.epizy.com/dunkin_donuts_munchkin_nutrition_info.pdf
    • http://texegap.epizy.com/17169996006.pdf
    • http://vajonaz.epizy.com/reloading_supplies_9mm.pdf
    • http://rasukadixekurij.rf.gd/65891904588.pdf
    • http://vuzuwukef.atwebpages.com/vatugasubeg.pdf
    • http://jekidosokun.epizy.com/android_bootloader_apk_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f50.bin
2722c1aac4373d572cc01e1c7e59eac4b7e850317f795cbde5ea0948904b7ffd
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F50 5372 bytes
font_01_sfnt_off000151a8.bin
77eb27b3d0f9f13abba102bd567eddfdbef3d8dee0cb59a789b5ad1e404920cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x151A8 10624 bytes
font_02_sfnt_off000175fd.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x175FD 4324 bytes