Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb369fcf953f78c2…

MALICIOUS

PDF

74.8 KB Created: 2021-01-16 07:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 482f39d13f3504e8afc3879933bf092e SHA-1: c32a14db89dee9ea1f50de289d5ea979a838ad22 SHA-256: eb369fcf953f78c294e774b7d4eef3fd562b6e151fbbe42e4a6d60762a3af98f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, 'https://trafftec.ru/123?utm_term=ccna+netacad+chapter+7+answers', suggests a phishing or scam attempt, likely disguised as educational material to lure victims. The PDF also functions as a link farm, pointing to numerous other PDF files hosted on disposable domains, further reinforcing the malicious nature of the document.

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://trafftec.ru/123?utm_term=ccna+netacad+chapter+7+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380536/normal_5fb27ae728f3f.pdfIn PDF document text
    • https://tomovomat.weebly.com/uploads/1/3/4/6/134617768/7772559.pdfIn PDF document text
    • https://site-1245721.mozfiles.com/files/1245721/68301268855.pdfIn PDF document text
    • https://site-1177405.mozfiles.com/files/1177405/castle_wreck_level_58.pdfIn PDF document text
    • https://puxibaso.weebly.com/uploads/1/3/0/9/130968956/nubivowubopajite.pdfIn PDF document text
    • https://site-1179585.mozfiles.com/files/1179585/xawijazofewigimexumumipur.pdfIn PDF document text
    • https://site-1168018.mozfiles.com/files/1168018/mgvcl_electricity_bill_check_gujarat.pdfIn PDF document text
    • https://site-1174638.mozfiles.com/files/1174638/audio_music_player_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391925/normal_5ff5d183728a9.pdfIn PDF document text
    • https://bexepusukanuv.weebly.com/uploads/1/3/4/7/134775428/xurupoder_somuwibegakoxes_vigibuxoxav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420030/normal_5fa0cf1979d05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/strength_of_materials_objective_type_questions_download.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_off0000e6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A6 5208 bytes
SHA-256: affe228a7f54873e3a199f2d3872d609a1f30a4e6d1acf56b0944f8572e127d2
font_01_sfnt_off0000f869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF869 11472 bytes
SHA-256: 5213c3b4c4dc9230e94d5af219375f113ca338ff919ae95df40d28956db21aa7

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