Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad89b358f1022e72…

MALICIOUS

PDF

77.8 KB Created: 2021-02-17 03:30:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8c58f079e8b05258ff0f76ecea932cce SHA-1: f65cf4d30b1785e94b2da2b79d76f3c8c4d23c62 SHA-256: ad89b358f1022e722d12642a75573c69773bab22ac8ee35061f3eb98f751d3ec
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external links, including one to 'druttle.ru', which is likely part of a link farm or phishing campaign. The document body, though heavily obfuscated, contains text related to 'Kenmore elite washer error codes', suggesting a lure to a malicious site.

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://druttle.ru/strik?utm_term=kenmore+elite+washer+error+codes+le PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454171/normal_5fef579480880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450438/normal_60230cf263616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424328/normal_601a776e8beb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494648/normal_5fe4e43c5acf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453909/normal_5fe981ddb273d.pdfIn PDF document text
    • https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/dibuzutotexude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419654/normal_601bf9a510dba.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/dgdF5ih/23976068001.pdfIn PDF document text
    • https://cdn.sqhk.co/wetilusogaki/ghjgjdp/nitolonorisal.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/dBgdqUS/batakirimuvafiwanugajises.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403422/normal_5feff3ecf2b10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411921/normal_601dd31c19ccb.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/maketexogakami.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/napisakaluja/73065996829.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/dividing_decimals_worksheets_common_core.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/yealink_w52p_cordless_phone_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/airline_tycoon_2_full_version_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/80497295013.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/microsoft_topology_diagrammer.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/40644714850.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/wofedugami.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/bootstrap_templates_with_code.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_off0000f3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C0 5240 bytes
SHA-256: c3a41c7ca041100c8a25a1e3799c8c3033f8553b7d69f2dd0e4a467ee23e4f52
font_01_sfnt_off00010577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10577 10540 bytes
SHA-256: dc0106ceb408241e182a344cc70f62c56da6ed5bcac0ba9e487e35138ba97c82

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