Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fc25b64d5c111d…

MALICIOUS

PDF

66.5 KB Created: 2021-02-13 08:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a554486d951875540c439d4893c868e6 SHA-1: 1814f10dd9ce04677b4a19059d7d46b6a0b3b3b5 SHA-256: 48fc25b64d5c111df36b783a4528713539b42cc6a906112bc71a663a773db95d
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score. The presence of a large number of external links, many pointing to PDF files hosted on various domains and CDNs, suggests a link farm or redirection mechanism. The embedded URLs likely lead to phishing sites or malware downloads, aligning with the 'Phishing.Trojan' classification.

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 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.
  • 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://jottigo.ru/wix?keyword=fundamentals+of+dimensional+metrology+answer+key+pdf PDF link annotation
    • https://cdn.sqhk.co/tuxonewebuke/fjjfmia/49920972000.pdfIn PDF document text
    • http://nigma24invest.online/11450824035phlep.pdfIn PDF document text
    • https://xifemobagot.weebly.com/uploads/1/3/4/0/134000541/bipopu-zowulalopobud-silexiwetex.pdfIn PDF document text
    • http://khareedforosh.com/mekesix3y18x.pdfIn PDF document text
    • https://cdn.sqhk.co/ledumixifer/hihjhLc/ninjas_stolen_scrolls_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/ijzIwY2/kajudijilijij.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/hahg1FI/95659925635.pdfIn PDF document text
    • https://ratofesut.weebly.com/uploads/1/3/5/3/135304008/gerularezime-mometokageg.pdfIn PDF document text
    • https://wafilanukeg.weebly.com/uploads/1/3/5/3/135309269/6244758.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/g4jeZ95/librairie_bdnet_nation_boulevard_de_charonne_paris.pdfIn PDF document text
    • https://cdn.sqhk.co/gijosevozu/EeicRNv/gidazanironoxozesopokuz.pdfIn PDF document text
    • https://cdn.sqhk.co/vetesomiw/mYligo2/hybrid_animals_photoshop.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/Gijhfhf/homescapes_level_2445.pdfIn PDF document text
    • https://cdn.sqhk.co/varomapit/1iighij/hack_game_fashion_design_world.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/CqV7jjy/42527855147.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ba3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA3F 5576 bytes
SHA-256: dc2d81711e203e342881025c83e303176cc7e9a015490d02d56a5d156daeb5e2
font_01_sfnt_off0000cd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3B 14236 bytes
SHA-256: 0e58988eb81b39189caba7dc542ae7defd2b6d088f5a80fdc15367e43c243e5a

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