Malicious PDF — malware analysis report

Static analysis result for SHA-256 7547d6f2963b9903…

MALICIOUS

PDF

75.4 KB Created: 2021-05-10 02:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fecf2a140da9ca09cd7461d8dcdb6c5f SHA-1: d84a8910877ec60421d3d0133c14f3879705b493 SHA-256: 7547d6f2963b99036bfb33dc36b50544e61c78a79e18cb05a652a8ba950adf0a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of 'utm_term' in one URL indicates tracking, common in phishing campaigns. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware distribution attempt.

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://soxebez.ru/strik?utm_term=born+a+crime+pdf+reddit PDF link annotation
    • http://kekijojovif.sportsontheweb.net/zisijebekesoxive.pdfIn PDF document text
    • http://motivawka.online/wedarisoterexcg.pdfIn PDF document text
    • http://womirewuzakuf.sportsontheweb.net/75119756552.pdfIn PDF document text
    • http://winoraama.space/flammable_cabinet_regulationsdcd4g.pdfIn PDF document text
    • http://vipadminler.org/312267270277espq.pdfIn PDF document text
    • http://tranquils.space/77833292884o5xyk.pdfIn PDF document text
    • http://bigtittybella.com/cual_es_la_estructura_cristalina_deab327.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/41912748752.pdfIn PDF document text
    • http://neo-tp.ru/how_to_rebuild_mikuni_hsr42bypeu.pdfIn PDF document text
    • http://kurixuj.sportsontheweb.net/behavioral_disorders.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fb1cd387-549b-40f1-a5a4-67fd65d29bb3.filesusr.com/ugd/4200b4_1b7edd03455b473f9f40b05532ce3ea7.pdf?index=trueIn PDF document text
    • http://gumuwojurigab.epizy.com/how_to_change_battery_in_stauer_atomic_watch.pdfIn PDF document text
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_813c697ca3fe435caa9f1e3fddac3c2a.pdf?index=trueIn PDF document text
    • http://xotaferuju.myartsonline.com/python_programming_language_tutorial_download.pdfIn PDF document text
    • http://jigisasamupor.onlinewebshop.net/lolerojaxagerevunuvun.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/12225743204.pdfIn PDF document text
    • https://03a45e23-20c9-4b13-8d21-50c2609e56df.filesusr.com/ugd/502f3d_ff28ee2f569345259e8cbef926fd65a7.pdf?index=trueIn PDF document text
    • http://tudixuzaw.onlinewebshop.net/botupofevumebuza.pdfIn PDF document text
    • http://medazupu.onlinewebshop.net/win_10_keyboard_shortcuts_settings.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_off0000e94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94E 5140 bytes
SHA-256: f3de4f2aead75b62d5a7d784af8e60ac3d05302e636b1581842d87ba5a2381b2
font_01_sfnt_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 11040 bytes
SHA-256: 5b69f86407dfb7853b4ce625e40e8c9625b29d2ca8ee27c13bc6759e0841bd5a

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