Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0507e1a083521c3…

MALICIOUS

PDF

77.7 KB Created: 2021-03-31 17:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 647e65d61287349813488fce22323de9 SHA-1: 77e87e9b7626ea4b08dd8f40f541494f62bc0801 SHA-256: b0507e1a083521c3b4c95a68f2f5e2280ae3001ae624247e95b2c7a4fbaad516
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external URLs suggest it is designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/award?keyword=bhagavath+geetha+book+in+telugu+pdf PDF link annotation
    • https://fimudelowuj.weebly.com/uploads/1/3/1/4/131455024/7cc0f3748bd49d.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/95761583927.pdfIn PDF document text
    • https://cdn.sqhk.co/menekilebuz/igKkkhi/battle_of_the_bulge_movie_free_download.pdfIn PDF document text
    • http://xutusurekawidi.medianewsonline.com/anglo_american_model_of_corporate_governance.pdfIn PDF document text
    • http://muzesumulel.getenjoyment.net/hydraulic_actuators.pdfIn PDF document text
    • https://cdn.sqhk.co/zelosoza/qjaibgf/survival_craft_2_upcoming_updates.pdfIn PDF document text
    • https://famereruzune.weebly.com/uploads/1/3/1/6/131637342/3651477.pdfIn PDF document text
    • https://cdn.sqhk.co/xadakede/hcji8wC/81000236565.pdfIn PDF document text
    • https://zuzameponotu.weebly.com/uploads/1/3/1/6/131606203/topubakuder.pdfIn PDF document text
    • https://ruxikikigiligex.weebly.com/uploads/1/3/4/3/134347308/denuvu.pdfIn PDF document text
    • https://xodumusekow.weebly.com/uploads/1/3/4/7/134708755/polelugul-walizabexesog-bedolusapotopow-fabemiromevo.pdfIn PDF document text
    • http://vumejopiraxu.mywebcommunity.org/boxing_training_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/terisuzuji/7ibidgi/laxowaluralotitevezidow.pdfIn PDF document text
    • https://cdn.sqhk.co/nigigeje/cieBFje/zutarudepajebajononegaxo.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/5gjgcjf/install_tor_browser_linux_mint_20.pdfIn PDF document text
    • https://cdn.sqhk.co/mojerakikav/hdjfjdT/shreya_ghoshal_songs_mp3_download_mr_jatt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pozidijapepore.atwebpages.com/debate_argument_structure.pdfIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_8db69c13f5f04b1d8627a5561d78350a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donarepemi/xijesifexuvemusivelog.pdfIn PDF document text
    • https://e6e31949-ba74-43ae-8e0c-2243355e89fd.filesusr.com/ugd/69e259_66f9b389084e41a281c5c40bd439d574.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bofake/honeywell_th5110d1022_installation_manual.pdfIn PDF document text
    • https://e8ceee85-86bf-4804-80ab-d7a1511cbcf5.filesusr.com/ugd/38650a_48e880bf70274b3f821aa603f3318c4d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wolina/canon_mg5620_printer_wireless_setup_mac.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E7 5344 bytes
SHA-256: 84583c35b9d088dcc2151899b5342899d2cc6c7b737ac58014afd1530a4a7ade
font_01_sfnt_off0000e923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE923 12320 bytes
SHA-256: 1d50a6c161fa28c00a2bfcea08ba204e49c3dc0264967d0442354bae05072094
font_02_sfnt_off00011227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11227 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8

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