Malicious PDF — malware analysis report

Static analysis result for SHA-256 400dbfe0b14c671f…

MALICIOUS

PDF

81.5 KB Created: 2021-03-14 21:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 72560d24c98ea63dd9360e9d74625625 SHA-1: 9d79fc075a6ba7a430f3f88be951b5cfa552282d SHA-256: 400dbfe0b14c671f7612e44231cb627f5a5125a5d87e59e6f65b8e82eae0894e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'baarspo.ru' which is presented as a search result for a Garmin manual. This suggests a phishing or malware delivery attempt. No scripts were extracted, but the PDF structure and embedded URIs indicate a lure to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://baarspo.ru/wix?keyword=etrex+30+garmin+manual PDF link annotation
    • https://cdn.sqhk.co/bozutebux/XziejiB/incivility_in_healthcare_metaparadigm.pdfIn PDF document text
    • http://dressnbuy.com/28080972786hkkpf.pdfIn PDF document text
    • http://quickpapp.online/academic_writing_course_bookoiwd6.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/veterinary_cardiology_textbook.pdfIn PDF document text
    • http://rezltml.xyz/vinixegegoladuxanogiu4qcs.pdfIn PDF document text
    • http://bestunew.xyz/stacked_washer_dryer_combo_gaszm3yk.pdfIn PDF document text
    • http://casbah2point0.com/85596908573aoedq.pdfIn PDF document text
    • http://gamedv.design/watch_the_collector_2004lwehj.pdfIn PDF document text
    • http://alifan.store/wagner_procoat_max_wont_primeci348.pdfIn PDF document text
    • http://tulumobutu.22web.org/public_policy_and_program_administration.pdfIn PDF document text
    • http://lupamepo.22web.org/paforametizegosiruwidox.pdfIn PDF document text
    • http://koteyarn.moscow/kobawovipijisu9g78.pdfIn PDF document text
    • http://reveruverof.medianewsonline.com/puzok.pdfIn PDF document text
    • http://bediwiluzosu.iblogger.org/jozidedawun.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/ljjid1T/girefomesuravisusagufis.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/VxjgheY/lidabubeluxum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jepevam.rf.gd/20978875264.pdfIn PDF document text
    • http://pabizazixivak.epizy.com/guided_buddhist_meditation_videos.pdfIn PDF document text
    • http://foxabivezafese.rf.gd/transformer_based_on_usage.pdfIn PDF document text
    • http://nivunurawusaxo.rf.gd/63802993921.pdfIn PDF document text
    • http://gakupoxefale.epizy.com/60165767558.pdfIn PDF document text
    • http://girakes.rf.gd/fingerprint_access_control_system_software.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/the_oxygen_thief_audiobook_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF483 4932 bytes
SHA-256: 5afb1e4bbfab0c74c925e7ac43307823b506e7f5f15dd2634ca0662e99bee9ae
font_01_sfnt_off0001052f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052F 11132 bytes
SHA-256: c94ad79a567cee5a31dfad559effa79a622e0664621e5c52ac14db40d1eae5ad
font_02_sfnt_off00012ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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