Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f4b9cff5b01f0a…

MALICIOUS

PDF

78.7 KB Created: 2021-03-28 14:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 89235d2875775e521f585fd32f6bbb5d SHA-1: f5fe214a829d841a566169aefd5f73408db25b57 SHA-256: 58f4b9cff5b01f0ac1cb780a1d3164cbc218554bcb5ab123fb522e71ff3f81e4
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as 'Pdf.Phishing.Trojan'. Heuristics indicate it functions as a link farm, with numerous embedded URIs pointing to disposable hosting. The document body, though heavily obfuscated, contains references to 'Harry Potter fan art' and 'wkhtmltopdf', suggesting a lure to disguise malicious links. The ML classifier output of 0.999777 further supports its malicious nature.

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://lozipotod.ru/wix?keyword=harry+potter+fan+art PDF link annotation
    • http://creamwalls.space/idaho_fish_and_game_salmon_harvest_reportj74fs.pdfIn PDF document text
    • http://biolinkus.me/xerosukoxarasowuniwizj10bf.pdfIn PDF document text
    • http://smcjd.com/318672341521uvl.pdfIn PDF document text
    • http://reassurez-moi-fr.info/31527194192b3a5d.pdfIn PDF document text
    • http://silkhfig.bid/98164497039tdunp.pdfIn PDF document text
    • http://contact-git.top/how_to_become_a_swat_officer_in_californiat2h4a.pdfIn PDF document text
    • http://kodamup.22web.org/sanirilujalemek.pdfIn PDF document text
    • http://appless.space/benogojuboxafapu94y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fimoxabol.epizy.com/dnd_spell_sheet_5e.pdfIn PDF document text
    • https://62bfe9e3-d01a-456c-9d14-3ac71290fd99.filesusr.com/ugd/cfe640_afa00a21be52468ebf61e2c2d399ce06.pdf?index=trueIn PDF document text
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_ff2be19b36a94c85bf8cc51f19da7b8c.pdf?index=trueIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_2efd9229822d40729af20c311b85dca5.pdf?index=trueIn PDF document text
    • https://12c21f6a-324e-488c-af83-7e1076049286.filesusr.com/ugd/e84f25_2abe3b4856c0423fb3981af882c9945a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6d3368b-15e1-47c9-a38d-ea510ed8c2e6/how_many_playing_cards_in_a_standard_pack_without_jokers.pdfIn PDF document text
    • http://logoroxesum.epizy.com/62680222630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7ad7c0b-c39a-45db-8b13-8d66a83f4c83/709602684.pdfIn PDF document text
    • http://supitemev.rf.gd/25991926728.pdfIn PDF document text
    • http://rarobijeriv.rf.gd/lizeduzukatizafiwepinav.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2C 4488 bytes
SHA-256: ef0d6c9c11175f267c29f7547beb33ea104ea8d69c1e1bb4f6eca4a8454fb375
font_01_sfnt_off0000fa75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA75 11040 bytes
SHA-256: 5a136ae4cad5f164afa30a7067427537c376a690a4d9e3ffc79e63267134da57
font_02_sfnt_off00011fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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