Malicious PDF — malware analysis report

Static analysis result for SHA-256 48675b67221c9100…

MALICIOUS

PDF

79.5 KB Created: 2021-04-26 23:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 31e25f0a823e985bf60b7d34e87a43de SHA-1: 2237db0413d44c077fa35b6e0d857cd94d2f63e8 SHA-256: 48675b67221c91000b0b0438f62c725728fe0bf77b89a54d4dfac332a6f2f05e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration of links pointing to disposable hosting and redirectors, indicating a link farm designed to obscure malicious destinations. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs suggests an attempt to redirect the user to potentially harmful sites, aligning with phishing or malware distribution tactics.

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://kuzutuzo.ru/strik?utm_term=craftsman+shop+vac+16+gallon+parts PDF link annotation
    • http://idealicagocce.site/2428311164757bmk.pdfIn PDF document text
    • https://vemujevamari.weebly.com/uploads/1/3/1/4/131452814/39763d1020804c1.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489994/normal_5ffec3c738030.pdfIn PDF document text
    • http://sixawuragime.iblogger.org/deathblow_xenogears_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391642/normal_60241e8226513.pdfIn PDF document text
    • https://biwewonopegad.weebly.com/uploads/1/3/1/3/131380063/5901604.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/xoguboramilorigavapu53.pdfIn PDF document text
    • http://mexicotop3.xyz/565633304299si9d.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/5b7e6052-7ef8-41de-893e-b4ac04709f06/the_art_of_racing_in_the_rain_cast.pdfIn PDF document text
    • http://fidajakafitota.epizy.com/28067524002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b86cc957-cbf0-43dc-bde9-98ac4fc6c6f3/48085760016.pdfIn PDF document text
    • http://bumemelowogo.rf.gd/gears_of_war_3_wiki_guide.pdfIn PDF document text
    • http://tiwevivixijobor.epizy.com/vofem.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/mufofojirimadaru.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/70949550159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb3dbb4a-a246-44ac-9405-18e10a7f1c87/juxomotijezebujag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5390b8c0-e6c0-436f-a407-f6f362683d88/36344040847.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/playlist_spotify_music.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/startup_company_business_plan.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_off0000f7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C2 5600 bytes
SHA-256: 58e2687afb8041e626d2babc434a7c96e33aab906519a643dbb2b7565c3ee9ce
font_01_sfnt_off00010ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB1 11148 bytes
SHA-256: 3266913c129679c3bf9174bb4765291f49bb6ee6be541add9ecb28113ae13731

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