Malicious PDF — malware analysis report

Static analysis result for SHA-256 493347971a68a91b…

MALICIOUS

PDF

69.7 KB Created: 2021-02-28 04:27:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b253e87bd8b1dff10c0f2d51c153bbb6 SHA-1: 922342428d8585d723dc88b9bc6e5246fb734edf SHA-256: 493347971a68a91b470d3b6dbc83b6e776553f5dc14f86dd7deabd5a2d6ded86
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, contains text related to file conversion, suggesting a lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=convert+2d+autocad+drawing+to+3d+online+free In PDF document text
    • http://tapozifokun.mywebcommunity.org/40754254113.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/dd_5e_xanathars_guide_to_everything_free.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/niv_study_bible_leather_engraved.pdfIn PDF document text
    • https://cdn.sqhk.co/nimuxugemu/dygsbJe/current_carrying_capacity_of_14_awg_wire.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/zabidaw.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/XGFRJeN/6761680427.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/rrigjOe/entrepreneur_quotes_facebook.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/nefexumoseta.pdfIn PDF document text
    • https://cdn.sqhk.co/popuzanuguw/iiadWjc/cut_away_means_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/hhKgcBT/vadale.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/what_is_the_science_behind_fasting.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiwatimab.atwebpages.com/que_es_la_historia_universal_contemporanea.pdfIn PDF document text
    • http://xumusemowujev.epizy.com/great_alternative_keyboard_for_android.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_off0000d444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD444 5364 bytes
SHA-256: abe2cbdb4b20d5d204bb0eddaac97727538fde1e818fdf9eee684be80ea69558
font_01_sfnt_off0000e6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AD 10384 bytes
SHA-256: e56a45486c6ab796ec9c6eb8da12355543899b4dc6252a3b15790c401a0f0221

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