Malicious PDF — malware analysis report

Static analysis result for SHA-256 b349efba24e21485…

MALICIOUS

PDF

68.2 KB Created: 2021-02-25 08:25:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f34d0b69fd06f75629a8f0ad39a58448 SHA-1: e3fd2505ce468bed0c24b111183065602d1cdd62 SHA-256: b349efba24e21485c6fb397601534e0a38d64b04a6dfabbf6cc2f125211e7ce1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm and by ML classifiers as malicious. ClamAV also detected it as Pdf.Phishing.Trojan. The presence of embedded URLs and the link farm heuristic strongly suggest a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment. No scripts were extracted, but the PDF structure itself facilitates the attack.

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://maypoin.ru/123?utm_term=mailboxes+international+houlton+maine PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446494/normal_5fef19fb1157e.pdfIn PDF document text
    • https://rifidikebipe.weebly.com/uploads/1/3/0/9/130969129/4f65a7bd833.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366402/normal_6000ea4f2e56a.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/83941293905.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392862/normal_5ff2573f5e282.pdfIn PDF document text
    • http://vorecan.fun/74415791026qzdi9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403407/normal_5fd84eba2ddc6.pdfIn PDF document text
    • https://vigijamavo.weebly.com/uploads/1/3/0/9/130968937/xumigoxal-kepozoraja-jofamepefadanem-xiwakurijimit.pdfIn PDF document text
    • http://all-gopro.com/photography_website_templates_themeforest1t64j.pdfIn PDF document text
    • http://jogemijafiw.22web.org/58734097143.pdfIn PDF document text
    • http://urro-hu.com/the_curse_of_la_llorona_downloadme2s2.pdfIn PDF document text
    • http://digitalmicroteter.xyz/cg_bhakti_song_dj3cx10.pdfIn PDF document text
    • https://neripekotijoba.weebly.com/uploads/1/3/2/6/132681370/vijurila-fikawazidoz-xapavif.pdfIn PDF document text
    • http://feldhaus-klinker-plitka.ru/the_open_window_short_story_in_urdud2jpz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zutugidod.onlinewebshop.net/what_is_electromagnetic_wave_formula.pdfIn PDF document text
    • http://fipiwafupogo.epizy.com/fatigue_management_guidelines_qld.pdfIn PDF document text
    • http://mebupeb.rf.gd/legend_of_zelda_theme_sheet_music_viola.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_off0000cdee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEE 5140 bytes
SHA-256: f1d250eccfef592ce25e377afed6928b65ef56cbc5a38fdbfbb6da203ac3920a
font_01_sfnt_off0000df44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF44 10764 bytes
SHA-256: ad30fc7e7cf3934f53d254ad3ad01110eda3f46d1da31e8335c843fb2df4bfb8

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