Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d107c383f68aa4…

MALICIOUS

PDF

69.1 KB Created: 2021-02-24 02:34:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5210362743cc4fdd0dc036f1a7921d54 SHA-1: 985610df56e8385a9036aba245469d679d28126d SHA-256: 82d107c383f68aa4f931770c46a14bc7bf8209920946d91092418b4dfee8783a
226 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://druttle.ru/strik?utm_term=super+mario+3d+land+3ds+rom+download PDF link annotation
    • http://guwelureg.22web.org/35062668308.pdfIn PDF document text
    • http://tafedudim.22web.org/pibiloxafapawe.pdfIn PDF document text
    • https://vojubewerele.weebly.com/uploads/1/3/4/0/134013512/tagujogitaderopidoga.pdfIn PDF document text
    • https://xafinuwexedigu.weebly.com/uploads/1/3/1/3/131379324/sokakima_zarodimufuw_mimimugixanuliw.pdfIn PDF document text
    • https://kekebamifibem.weebly.com/uploads/1/3/1/6/131606854/6726575.pdfIn PDF document text
    • https://cdn.sqhk.co/dukizukijire/cX9Kwr8/zotekegimuxuze.pdfIn PDF document text
    • https://ganokupojedozo.weebly.com/uploads/1/3/4/8/134890080/3187e88bafb5.pdfIn PDF document text
    • https://jiresuzava.weebly.com/uploads/1/3/4/7/134706808/lewiwirisi-basurod-fatakidesuberar-begopinaxubejuk.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/gDqRjGk/best_movie_collection_database_app_2018.pdfIn PDF document text
    • https://pimidunobesuxig.weebly.com/uploads/1/3/0/9/130970022/wopugo-dozizetiv.pdfIn PDF document text
    • http://bilkaita.space/how_do_i_check_the_status_of_my_sc_drivers_licenseuulsg.pdfIn PDF document text
    • http://logemopi.22web.org/z_black_mp4.pdfIn PDF document text
    • https://cdn.sqhk.co/letabuner/CiekgkJ/suxina.pdfIn PDF document text
    • https://zinegekoxemajaj.weebly.com/uploads/1/3/4/7/134767253/cc0c37.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/jevopemosod/xibagopalegi.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/togisegewapitupox.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/erc_cpr_guidelines_2010.pdfIn PDF document text
    • http://dezizogumeb.epizy.com/68993077705.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF18 5464 bytes
SHA-256: 0085da179adc27ca9a6735d1a753eb4b73638cc8ec1f7d2b5591360e225057c1
font_01_sfnt_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 10876 bytes
SHA-256: 5f7cbfe84810225f2ab3e06bee1cf9061a2cc8160ee43eab7bb6ab8440b2f8f1

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