Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52baa658a5f5b52…

MALICIOUS

PDF

74.4 KB Created: 2021-03-14 06:09:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: eba5ef386ce4ae1c748d7244ec7a66da SHA-1: f97968748dffa9cdb6ec66810703d1e008c4b81b SHA-256: d52baa658a5f5b52de31066421b156f443f8662d6d7aea99153cf07223f39420
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including ClamAV and an ML classifier. It contains a large number of embedded URLs, with at least one identified as a known malicious redirector. The file's structure suggests it's designed to host a link farm, likely to distribute phishing content or malware. No scripts were extracted, but the presence of numerous malicious links points to a phishing or malware distribution campaign.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=star+theory+rm+drake+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_603e796d2954e.pdfIn PDF document text
    • https://cdn.sqhk.co/tavevalurov/FujeZia/lokomuvenefaxupa.pdfIn PDF document text
    • http://trokot-online.xyz/yuva_upanishad_computer_book_downloadxiius.pdfIn PDF document text
    • http://devicesprotectionforusers.site/battletech_a_game_of_armored_combatmgmc7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488092/normal_6008b6f6212d7.pdfIn PDF document text
    • http://bioforce-co.site/service_manual_honda_civic_2006v4np7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476288/normal_5ff15622a16d5.pdfIn PDF document text
    • https://cdn.sqhk.co/redusebi/D3ijOha/16025279269.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_9369d126163d4a8f99792a23491986d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jobavo/chep_guidelines_htn.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/82803878011.pdfIn PDF document text
    • https://d992f69e-bc5b-430a-92d7-abfd66d0380b.filesusr.com/ugd/6f7357_8147df2661834540b877c9b1359df3b6.pdf?index=trueIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_30306592c7734eeaa30bd845fec2c8c3.pdf?index=trueIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_fddff6476e7b4636b7ccfad6a9c4ff73.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lanaladu/bulloo_shire_council_road_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/habanera_orchestra_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/67461666457.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/35491564382.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 2

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_off0000e2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F2 5340 bytes
SHA-256: 18bd48a61bd1d5f69517b5fd46ba6ac140f905f8f596defb965e75703d681431
font_01_sfnt_off0000f4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FC 11720 bytes
SHA-256: 63066d7bc3aa2c7ce2bcfec1d0a4d1a9503fad101a47f6660716015026e139ef

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