Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ad2e501775e7c0…

MALICIOUS

PDF

89.6 KB Created: 2021-02-26 09:33:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 555bb16afcf5fa683d7a5c3d527b62bd SHA-1: 5d2c67f1549b26b20377a35bbad17973c75aaeb1 SHA-256: 48ad2e501775e7c087df5cd252e5f747839bcebd9847b1f21e6951c8184baa32
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to link farms hosted on disposable domains, with one critical redirector link identified. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and URL analysis suggest a phishing lure disguised as a guide to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=how+to+build+farm+road In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451206/normal_601267ef6d4aa.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/5865523659.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/brother_mfc7860dw_driver.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/33202023583.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/90550519528.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/garmin_oregon_600_firmware_updates.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fekuzigide.epizy.com/citric_acid_50_safety_data_sheet.pdfIn PDF document text
    • http://nigiragesowujow.epizy.com/auriculares_bluetooth_android_mercadolibre.pdfIn PDF document text
    • http://mejusamenubeto.rf.gd/39407812960.pdfIn PDF document text
    • http://xipanizi.myartsonline.com/tidiwibaje.pdfIn PDF document text
    • http://boxugajot.rf.gd/banished_tv_series_episode_guide.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/powup.pdfIn PDF document text
    • http://wofukisunoxo.epizy.com/mapamundi_grande_con_nombres.pdfIn PDF document text
    • http://lozepis.epizy.com/fagikatiz.pdfIn PDF document text
    • http://xelidamos.epizy.com/nta_net_sociology_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/anjana_anjani_all_songs_pagalworld.pdfIn PDF document text
    • http://navibizo.rf.gd/56512977334.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_off00012224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12224 5068 bytes
SHA-256: 7f623f0067a6c0c5582376aa0a6babc48c7cf5146b57fd030a864a2e9ce21866
font_01_sfnt_off0001335b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1335B 11188 bytes
SHA-256: 791a8b099dc4b1d57bb0d178d1ca21312c885b4859fd3ad404e29492021b4d88

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