Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d4d72af44533d1…

MALICIOUS

PDF

96.8 KB Created: 2021-03-13 12:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0190d68ec4943376fa616431b3e08868 SHA-1: 3e4d534c8ff8ad6236e924b6c44608671b247f36 SHA-256: e7d4d72af44533d16dacfd13a2acbd996ef50b8bf107243f829dd80be45a5b66
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs point towards an attempt to redirect users to potentially harmful websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/award?keyword=brahui+language+pdf PDF link annotation
    • https://cdn.sqhk.co/moturira/hMJvfbK/29514838328.pdfIn PDF document text
    • http://hookup671.site/517162175792r8qg.pdfIn PDF document text
    • http://lg-supportteam.com/the_hunger_games_catching_fire_book9zpd5.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/hbMTif9/megan_thee_stallion_lyrics_captain_hook.pdfIn PDF document text
    • https://cdn.sqhk.co/wagavoketi/hfUnhjS/92283171770.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/0jgicie/77896124342.pdfIn PDF document text
    • https://burakatotofok.weebly.com/uploads/1/3/1/8/131871829/mijeramuledur.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/haFEhdr/52044724607.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/ZKw0hji/5178453488.pdfIn PDF document text
    • https://jowatoziji.weebly.com/uploads/1/3/4/8/134893097/6290767.pdfIn PDF document text
    • http://verefdliyvtorogo.xyz/stock_market_crash_2008_moviega22i.pdfIn PDF document text
    • https://piziwola.weebly.com/uploads/1/3/1/3/131382430/7980373.pdfIn PDF document text
    • http://pearhaidhr.fun/gudes9io29.pdfIn PDF document text
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/wexab-tixajeguxi.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/didhjrN/ring_a_bell_meaning_origin.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/sajatesawodiji/what_operating_system_for_gaming.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/categorising_love_reading_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/72274194256.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/regorokokazajevef.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001164f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164F 5176 bytes
SHA-256: 392584b7f1fe3718cc8937be156ef225723b1155f12a818af56cae520f9aa300
font_01_sfnt_off000127eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EB 17560 bytes
SHA-256: ee846bee3cf144127eddab6e5f64f7ee3d43640d99ac491e9a43e920bfb6a9c2
font_02_sfnt_off00015c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C3B 16992 bytes
SHA-256: 58ba34cafe821ab69a31bb17a241b97b30867592bb55c69d226352797d376269

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