Malicious PDF — malware analysis report

Static analysis result for SHA-256 4891add525058d07…

MALICIOUS

PDF

104.4 KB Created: 2021-03-01 06:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3eadafd69e14f96ece716598a506957e SHA-1: b024dca6360761bca83a44802a5d11cc4855154e SHA-256: 4891add525058d073e681fb1f8ae4701df6929b690e4a3101a55147b536101dc
126 Risk Score

Malware Insights

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

This PDF was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to 'Persepolis tomo 1 pdf' and authoring application details, likely serving as a lure.

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://gimoguvi.ru/wix?keyword=persepolis+tomo+1+pdf PDF link annotation
    • https://rixogeki.weebly.com/uploads/1/3/4/6/134693266/jakudebarig-pezofavediwalu-kajozizas-gapogopari.pdfIn PDF document text
    • http://armlur.space/9519778383455u0z.pdfIn PDF document text
    • https://cdn.sqhk.co/panazomuv/hEggDzV/crowd_control_twitch.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/zedoxulowutedaxorilalavo.pdfIn PDF document text
    • http://avtovishki-msk.ru/pafivarelidoky2gaw.pdfIn PDF document text
    • http://sbrf.link/rodoraloviga8s0.pdfIn PDF document text
    • http://fisusuwisefib.22web.org/blackjack_cheat_sheet_card.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/rerurutazuzozaguge.pdfIn PDF document text
    • http://trysucre.pro/186434720417i0mk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://medipebep.rf.gd/unir_dos_gratis.pdfIn PDF document text
    • http://robinovedibepo.epizy.com/flyers_template_online_free.pdfIn PDF document text
    • http://dufuvebali.rf.gd/famipazinoj.pdfIn PDF document text
    • http://derekom.rf.gd/workplace_accident_reporting_procedures_ontario.pdfIn PDF document text
    • http://davojuke.epizy.com/best_android_mobile_phone_under_2000.pdfIn PDF document text
    • http://sitojedakolotil.rf.gd/gw2_guild_hall_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000151a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151A3 4712 bytes
SHA-256: ad65d1280ff564dfb90049caacc43bde98f140105a63ffb5f18d0e474529af91
font_01_sfnt_off000161ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161AC 10864 bytes
SHA-256: fc431d0527ef99ce62aca4062b34ae48325874f618c3c9986b57833d8c162721
font_02_sfnt_off00018671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18671 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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