Malicious PDF — malware analysis report

Static analysis result for SHA-256 45920e155d80b31e…

MALICIOUS

PDF

78.3 KB Created: 2021-03-15 09:24:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2cf47c5adb6d81c7bd38b6057571ac57 SHA-1: 1b159b6f2b49f9e1b147bd51f6fe13e6a4ef7c9d SHA-256: 45920e155d80b31e1ac270e0259ffc040439d31f982640ab19f05e603f3bb6bc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9996

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://xajibur.ru/wix?keyword=maytag+atlantis+dryer+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464871/normal_5fcea674136f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459059/normal_5fd8507d82974.pdfIn PDF document text
    • http://josigowuwerojov.iblogger.org/business_description_template.pdfIn PDF document text
    • http://freehookup.xyz/zipejorsd4g2.pdfIn PDF document text
    • http://sks-expertiza.ru/cateye_wireless_bike_computer_reviewsmzu4h.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/common_french_expressions_idioms.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475725/normal_60084109ec31f.pdfIn PDF document text
    • http://biwonomapul.iblogger.org/pikudixawupitufar.pdfIn PDF document text
    • https://gixatupugibezi.weebly.com/uploads/1/3/5/2/135296842/6555118.pdfIn PDF document text
    • https://fukagopesuzidad.weebly.com/uploads/1/3/1/3/131381553/2214421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490264/normal_5fd1fda667ac3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503767/normal_5fe90eb2d8990.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/sims_3_expansion_packs_download_mac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384310/normal_5fc84fbf40372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486344/normal_601dd1bdb73fe.pdfIn PDF document text
    • https://vasetovomakoti.weebly.com/uploads/1/3/2/7/132741031/4407020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375209/normal_5fc717e150b23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/55699419714.pdfIn PDF document text
    • http://nitumajalu.epizy.com/44686495769.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/vobajorebinetigola.pdfIn PDF document text
    • http://tikimiwuwal.myartsonline.com/goblin_mount_vendor_bfa.pdfIn PDF document text
    • http://josuguremim.epizy.com/enfield_grammar_ofsted_report_2018.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_off0000f5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D2 5252 bytes
SHA-256: 33c38190f1946c955103a986af69bb9be5e6a12b5135cbd50cbe4085558b382a
font_01_sfnt_off000107ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AD 10616 bytes
SHA-256: ccfa45c4b18ae6fca02d26aefee6d652523f8dce270b2db2742d20a0836941e7

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