Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e325a53220fec5…

MALICIOUS

PDF

81.2 KB Created: 2021-05-16 14:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fb7584c60b1cbbd524285a2623365ea7 SHA-1: b047b0b0c4c289cc79640ce526c1d1d382dd734e SHA-256: 03e325a53220fec5f7ebf5374e0364eea1803fc79023e0b0d3a68ca2c1a8606f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to product reviews, suggesting a lure to disguise the malicious nature of the links.

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://xezojetit.ru/strik?utm_term=vizio+v-series+5.1+home+theater+sound+bar+reviews PDF link annotation
    • http://raifaisentapp.online/volkswagen_amarok_v6_manual4wr3y.pdfIn PDF document text
    • http://busforpay.online/5121146861cprbw.pdfIn PDF document text
    • http://prizinsta24.space/sinuwobowexe218f8.pdfIn PDF document text
    • http://electorat.org/45112491166f625k.pdfIn PDF document text
    • http://widalatipuna.22web.org/divirevufow.pdfIn PDF document text
    • http://setofexperience.site/xexusera8mwvm.pdfIn PDF document text
    • http://particulieres-societegenerale.best/janakenetugujobesemutezr65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/71bf140e-1bf0-4998-a993-d010ab11f51b/40453082538.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/mixegipakafafifusozasuw.pdfIn PDF document text
    • http://misopepiwabaju.epizy.com/xuzifitifixojuxefara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc81b7a5-fddc-4948-ac15-36367dbda562/xabatil.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/what_are_visual_cues_in_reading.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/kofetenidinunu.pdfIn PDF document text
    • http://maxovizanopi.rf.gd/pepiru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53ff461b-26d4-45e6-8cbe-a56619b02989/tiparejata.pdfIn PDF document text
    • http://forozilixoder.rf.gd/fifawamotakeke.pdfIn PDF document text
    • http://sijeregezokim.rf.gd/alsynite_fibreglass_roof_sheeting.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_off0000fa4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4E 5580 bytes
SHA-256: 18efdb09a917a61beaaa199251e02579816f343d15e0ae3ba8b9d09583948d75
font_01_sfnt_off00010d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4D 11840 bytes
SHA-256: 81ab7221c6a0539bcd1991b7baed88d10a9a173eada9af363e845427780edcef

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