Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8db64d86e45d7f3…

MALICIOUS

PDF

85.8 KB Created: 2021-04-09 00:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62ad0f1869685db15e689d255cde73a6 SHA-1: 5fe0f2bf71edd92f651595e5a63aff92ff7266f5 SHA-256: f8db64d86e45d7f31906b229205a5e8db655196102156e9b0224749a71c4e5fb
134 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and uses an urgency lure, suggesting a phishing attempt. The embedded URL `https://soxebez.ru/strik?utm_term=what+kind+of+baby+formula+does+wic+give` is likely part of this phishing campaign. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs are indicative of malicious intent, possibly involving JavaScript execution for redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://soxebez.ru/strik?utm_term=what+kind+of+baby+formula+does+wic+give
    • http://rozel.ru/avatar_-_photoshop_plugin_free_downloadpjn4y.pdf
    • https://cdn-cms.f-static.net/uploads/4403539/normal_604a4d3e9384d.pdf
    • https://cdn-cms.f-static.net/uploads/4471475/normal_60591e2e9c200.pdf
    • https://static.s123-cdn-static.com/uploads/4409621/normal_5fe1761f236f4.pdf
    • https://cdn-cms.f-static.net/uploads/4457011/normal_5fdbdce251dc0.pdf
    • https://cdn-cms.f-static.net/uploads/4484639/normal_60621fd817e32.pdf
    • http://cherrypimp.online/63252445432y6u7d.pdf
    • https://gajifawegux.weebly.com/uploads/1/3/4/6/134649352/8229862.pdf
    • http://flash-sar.online/dsi_operations_manual_numberg09if.pdf
    • https://judurufag.weebly.com/uploads/1/3/4/6/134688768/200509.pdf
    • https://static.s123-cdn-static.com/uploads/4451561/normal_5fef7c540bbd6.pdf
    • http://leopolds.space/averages_from_frequency_tablesae20r.pdf
    • https://cdn-cms.f-static.net/uploads/4413967/normal_6032763f712c7.pdf
    • https://static.s123-cdn-static.com/uploads/4483388/normal_6007f27c313db.pdf
    • https://zowamuzifam.weebly.com/uploads/1/3/1/1/131163536/4458822.pdf
    • https://ziposubiv.weebly.com/uploads/1/3/0/9/130969570/wipiziz_lovozogavax_dajuf_domolinozexel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jewizopukuni/nodupezemobifalibuno.pdf
    • https://uploads.strikinglycdn.com/files/f703a197-781a-4dad-acdd-defc05b2586e/dhs_system_engineering_certification.pdf
    • https://s3.amazonaws.com/falevi/artistic_anatomy_paul_richer_free_download.pdf
    • https://s3.amazonaws.com/fedojigudaj/what_size_file_for_455_rancher.pdf
    • https://uploads.strikinglycdn.com/files/144da531-e0c9-4011-843f-3a12aa296027/famuxufujufemibaja.pdf
    • https://uploads.strikinglycdn.com/files/b7b42889-1593-49a1-8c08-a96c5ed0566a/what_is_the_difference_between_sunni_and_shia_prayer.pdf
    • https://s3.amazonaws.com/tinezedu/kotor_2_hanharr_influence_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fbb.bin
d9073fccbfa7455f1d73febfb0425ff289784b6f79748ef497f0fb1c78a9dea7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBB 5904 bytes
font_01_sfnt_off000123d5.bin
4eedece472fe702895cc95c8d13eb763ddeede8bc634bf344d7b6cb028851d10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123D5 11036 bytes

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