Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dbd8c5f931d3e1f…

MALICIOUS

PDF

79.4 KB Created: 2021-03-24 21:00:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0d4cdb39aa596725609c8eb4aabd41ac SHA-1: 3c9662d22923e7fde7b5265778cfb04f16d6d1be SHA-256: 2dbd8c5f931d3e1f497acc9d41ce824005d234b7a5a01c18f38909bbafb2a518
126 Risk Score

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://fokemale.ru/strik?utm_term=buying+property+for+dummies+pdf PDF link annotation
    • http://xilibinebosapeg.mywebcommunity.org/joxabelumatirareva.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/ttTibgh/63891567208.pdfIn PDF document text
    • http://jigapenufi.medianewsonline.com/bilingual_dictionary_english_french.pdfIn PDF document text
    • https://turujidimubexu.weebly.com/uploads/1/3/4/7/134766340/1429176.pdfIn PDF document text
    • https://suxapenogabako.weebly.com/uploads/1/3/4/6/134602080/ragelipobavitudad.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/fundamentals_of_astrodynamics_and_applications_vallado.pdfIn PDF document text
    • https://cdn.sqhk.co/nojebimit/jiNE1gh/55301796710.pdfIn PDF document text
    • https://cdn.sqhk.co/pasezateda/hbrWyhj/the_walking_dead_hd_wallpaper_iphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://daraxojizusavu.epizy.com/dry_erase_board_sheets.pdfIn PDF document text
    • http://kipejefanowisu.atwebpages.com/led_zeppelin_fool_in_the_rain_drum_cover.pdfIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_20b65ca5030343198085e04c7187189a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/reforudesuvuwun.pdfIn PDF document text
    • http://nuwadolonopip.onlinewebshop.net/shunt_capacitor_compensation.pdfIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_d38e9649f83d403b8fb27d1a6aab0826.pdf?index=trueIn PDF document text
    • http://gipanigiwulaj.epizy.com/20241983671.pdfIn PDF document text
    • http://wibumumodudofud.epizy.com/2857799234.pdfIn PDF document text
    • http://jefesati.rf.gd/align_start_android.pdfIn PDF document text
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_5df953d826a74954aba6616987c53b6e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kigavanus/nujeluworigezugofedomopiv.pdfIn PDF document text
    • https://cceb078e-1df6-42b0-9e12-359f30e42f1d.filesusr.com/ugd/e8506d_4906c6de30f14c27b38156eff64a93d8.pdf?index=trueIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_d5a28eec1bd54346a72a636299728e41.pdf?index=trueIn PDF document text
    • http://muzoxed.rf.gd/ponololodebagutusej.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_off0000f79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79D 5272 bytes
SHA-256: babc1d10c55150661f28b2fa215bd1ed9614056266d4bcf651113b1d28a4da50
font_01_sfnt_off0001098d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098D 11232 bytes
SHA-256: d69abd524a84ee79ef763aaa206cb6961dd4dcd5356790fc4975f6d75b298c4a

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