Malicious PDF — malware analysis report

Static analysis result for SHA-256 61506904cb7492b9…

MALICIOUS

PDF

92.1 KB Created: 2021-02-27 07:03:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9e86a293a0b97c302b922150d9706ecb SHA-1: b84f6b6b990abb3af2310c56de906617094e39c6 SHA-256: 61506904cb7492b95edc93066bc3a34f0d4ba27d9d35cb238be57ecef7b0cc3b
126 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm hosted on disposable domains. The PDF contains numerous external URIs, including one pointing to 'lozipotod.ru', suggesting an attempt to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/wix?keyword=d%2526d+gold+silver+copper PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393179/normal_5fe0df2c5109b.pdfIn PDF document text
    • http://maturibcgj.space/54717097847310co.pdfIn PDF document text
    • http://unosital.space/perbedaan_teori_motivasi_maslow_dan_herzbergivy3l.pdfIn PDF document text
    • http://strahauto.website/fluval_306_canister_filter_mediaac1mv.pdfIn PDF document text
    • http://instapriz24.online/algebra_1_common_core_regents_workbook_answersadjl9.pdfIn PDF document text
    • http://6gusevshop.space/datacamp_jupyter_notebook_cheat_sheetv93k8.pdfIn PDF document text
    • http://study-english-04.space/40550419583gr2nj.pdfIn PDF document text
    • https://cdn.sqhk.co/poxedomeke/nPOUajg/ports_minigames_rs3.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/frjiLI5/toon_blast_cheat_codes_iphone.pdfIn PDF document text
    • http://nout-sale.site/218453018874viql.pdfIn PDF document text
    • https://cdn.sqhk.co/lamajemomu/hchiffV/nituzuvipenulilepiw.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/gjjmFTz/download_tiktok_without_watermark_shortcut.pdfIn PDF document text
    • http://agent-ritual495.online/voice_live_playoffs88d7h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gigolovumiguse.rf.gd/78323538518.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_off00012c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C79 4156 bytes
SHA-256: 58eabb24298f18ab3cb5c3f3a5652a185830994b36fd37cd9ad46fcf77495092
font_01_sfnt_off00013aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA8 12988 bytes
SHA-256: 73c792c5409da893c9f627acb04f13f7dd7ef5689a7dbaddf85ce4b5316f5988

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