Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2d1cafb3accc42…

MALICIOUS

PDF

80.9 KB Created: 2021-04-18 09:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 77dd6cfaec88ee1bdd4e3aa3773fbfb9 SHA-1: bb60e15f11c28ed8aa1ae97c44a03c0708464f84 SHA-256: bd2d1cafb3accc4298c7d09265b6f2c603f8451392497ddc1e736fbd6f4a6c33
156 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. 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 0.9995

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 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.
  • 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://crophysi.ru/strik?utm_term=grill+grates+for+weber+spirit+210 PDF link annotation
    • https://romigugegis.weebly.com/uploads/1/3/1/3/131384185/8717490.pdfIn PDF document text
    • http://dapajibidamazed.mypressonline.com/kusefuxudavodakinimupew.pdfIn PDF document text
    • https://xaxexuwolak.weebly.com/uploads/1/3/5/9/135978614/jamurovisovesumus.pdfIn PDF document text
    • https://gumelajijepepa.weebly.com/uploads/1/3/4/6/134639918/kotakedebukupem_xebunesubula_redew_funazewofikuju.pdfIn PDF document text
    • https://kazumole.weebly.com/uploads/1/3/1/4/131454435/serapa_tijanofuze_rufesiwokizogoz.pdfIn PDF document text
    • https://bilurowunolip.weebly.com/uploads/1/3/4/3/134316979/piratoguzupuro.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/lorerexeg/76189116390.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/who_owns_bobbi_brown_cosmetics.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/10684382362.pdfIn PDF document text
    • http://fepetixapokurob.myartsonline.com/functionalism_in_sociology_of_education.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/full_fitted_sheet_on_queen_bed.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/how_to_find_your_ring_size_chart.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/novajolixawisonupapu.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/inevitable_desastre_gratis.pdfIn PDF document text
    • http://xiwexuxe.atwebpages.com/pm_awas_yojana_form_rajasthan.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/when_did_japan_withdraw_from_the_league_of_nations.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/vb.net_tutorial_javatpoint.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/tonumimijonimorejazetejan.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/lojudasezemadelu.pdfIn PDF document text
    • http://pogetowem.onlinewebshop.net/79575719704.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/20873867948.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/bonus_ball_template_sheet_printable.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_off0000f1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CF 2952 bytes
SHA-256: e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0
font_01_sfnt_off0000fc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5D 5660 bytes
SHA-256: ebf39046adea7a6b6d8226caaeaaf358b240c1ff2c007e49dc96905f37209f8b
font_02_sfnt_off00010fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCF 10700 bytes
SHA-256: 35af7780f0e9d65daccee01ec93f29a617ba12d9a682ce4614a1c7bd8f88f4e5

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