Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec79bcd9b342d082…

MALICIOUS

PDF

76.3 KB Created: 2021-02-18 06:43:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 5b42323da5e350318f468d9d4af3eb2f SHA-1: e3de56bc484e47c3e2bfe3cb74d4d9d6dd9b0995 SHA-256: ec79bcd9b342d082699258244cece1ac04ecd6ad4a9298f13d591ada60a59af0
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 of which point to disposable hosting or suspicious domains, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure indicate an attempt to redirect the user to malicious content.

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://leonvi.ru/strik?utm_term=parkour+near+me PDF link annotation
    • https://xinofebew.weebly.com/uploads/1/3/5/3/135305957/1461476.pdfIn PDF document text
    • http://compte-cmbretagne.best/54451997913r11xq.pdfIn PDF document text
    • https://lizatupapej.weebly.com/uploads/1/3/4/4/134401074/1744715.pdfIn PDF document text
    • http://chambrehq.xyz/4000521402aue2k.pdfIn PDF document text
    • https://xorizugabe.weebly.com/uploads/1/3/1/3/131398100/8910917.pdfIn PDF document text
    • https://sekikeke.weebly.com/uploads/1/3/4/7/134739811/9657710.pdfIn PDF document text
    • https://nobobigo.weebly.com/uploads/1/3/4/4/134403715/7022652.pdfIn PDF document text
    • http://topcabinets.xyz/cydia_ipad_freej6fic.pdfIn PDF document text
    • http://kidepokapila.22web.org/silapigo.pdfIn PDF document text
    • https://wazurewimi.weebly.com/uploads/1/3/4/5/134598950/955603ed24e62.pdfIn PDF document text
    • http://fufumizajo.22web.org/gefutinedoja.pdfIn PDF document text
    • https://lotekine.weebly.com/uploads/1/3/1/3/131381428/9964688.pdfIn PDF document text
    • http://cosmosqrab.online/brave_frontier_mod_apk_terbarua9bfn.pdfIn PDF document text
    • https://fosaxobe.weebly.com/uploads/1/3/4/8/134882536/teliguxekaxetaw-vonukaxaf-widumosare.pdfIn PDF document text
    • https://lenopeseku.weebly.com/uploads/1/3/4/0/134040497/7842587.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/taguxif/google_chrome_offline_installer_msi.pdfIn PDF document text
    • http://tapejufujol.epizy.com/how_to_clean_the_technivorm_moccamaster_coffee_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/64227473040.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/always_on_display_samsung_android_8._0.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_off0000f004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF004 4688 bytes
SHA-256: e9bc75425a5ff584916ab21e4e8867e6607e547afbdad35adb389aaa35f7f082
font_01_sfnt_off0000ffdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 10644 bytes
SHA-256: 2624d656533615b5b15a3d5950139d09412942c8b7b8e26457593aaf4fe8ecfa

Open this report in the interactive analyzer, or submit your own file for analysis.