Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb5254329b0e9de…

MALICIOUS

PDF

68.1 KB Created: 2021-03-06 21:32:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2245fa7cdabd7243703a5a794807e583 SHA-1: 7b35936a17f22e01c9e68cbb9253d6a1738dde97 SHA-256: afb5254329b0e9de47548aacca4ad0db795e4b1e4f5b0f246d9d9ee929f5bf82
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to 'Honda outboard service schedule'. The presence of numerous external URIs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/strik?utm_term=honda+outboard+service+schedule PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379034/normal_60077bb10f71c.pdfIn PDF document text
    • http://sipoxamux.22web.org/toresorekesimumifadu.pdfIn PDF document text
    • https://panulozeti.weebly.com/uploads/1/3/5/3/135351273/rofefamanufi_fazimexugapoma_wuwuxexobipuwu_lewejozevoneri.pdfIn PDF document text
    • http://doburepos.iblogger.org/99550242086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401732/normal_6041903f6f46c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_603af1b414666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409811/normal_601416761c84c.pdfIn PDF document text
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/148766.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459776/normal_5fe094349ea67.pdfIn PDF document text
    • https://vigoruso.weebly.com/uploads/1/3/4/1/134131386/fawivudelar_gutujije.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_0eec22cccf9b4575b48719c9c375b46c.pdf?index=trueIn PDF document text
    • http://jaxejibowanub.rf.gd/4._what_are_the_pros_and_cons_of_trait_theories_of_personality.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_eda0d7def4584ee6b567bd6032cddce5.pdf?index=trueIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_10dac04d2e6040f98ff0d242a15246b9.pdf?index=trueIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_b57da13128f24a1bb6292a4414418ed1.pdf?index=trueIn PDF document text
    • http://talufexorumonij.epizy.com/kick_the_buddy_forever_mod_game.pdfIn PDF document text
    • http://jiwerefupuz.epizy.com/how_to_read_whirlpool_duet_error_codes.pdfIn PDF document text
    • http://gobewodekopatu.epizy.com/linksys_ea6400_firmware.pdfIn PDF document text
    • http://rojapamun.epizy.com/fun_facts_about_canada_s_food_guide.pdfIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_57baefcbe59d4f42b70ae76789455c9d.pdf?index=trueIn PDF document text
    • http://pudunajuge.rf.gd/luwafonulududelid.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_off0000d16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16E 5188 bytes
SHA-256: 2fb1a72947b003c4b1cbd1363cd2b4edb865ac2be1ea6faac2898a6947e8003d
font_01_sfnt_off0000e30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30A 9344 bytes
SHA-256: befa176da8989efa7ee010550215ffeb74516e2298a479aa0e21607024b2c52d