Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd3071790c683cd…

MALICIOUS

PDF

80.9 KB Created: 2021-03-23 11:01:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 381c71187803c2c0da0093014a7f43c1 SHA-1: 2102a350971971e5170968cd5979c7f86adc36ed SHA-256: 2cd3071790c683cdc08c91e886916f6178fba65339b84ae562740affd11b86c7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=primeweld+ct520d+manual PDF link annotation
    • https://munipepuxorikoz.weebly.com/uploads/1/3/0/9/130969311/5821361.pdfIn PDF document text
    • https://cdn.sqhk.co/serojimo/igphhib/august_underground_parents_guide.pdfIn PDF document text
    • https://gupolapi.weebly.com/uploads/1/3/4/6/134629895/valirexa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_600db9e39aab6.pdfIn PDF document text
    • https://cdn.sqhk.co/pizililiv/gjFgig2/bloons_td_battles_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393363/normal_5fd86169114b6.pdfIn PDF document text
    • http://dekopubetalukaz.22web.org/85889087297.pdfIn PDF document text
    • https://zewadozodatigi.weebly.com/uploads/1/3/4/3/134337643/254010.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/Shggcje/download_stickman_project_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_60364a89437fa.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://divasopib.rf.gd/50386990486.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/lefupenirutujulo.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/diverejurimuxenodewalexo.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/kisutuvi.pdfIn PDF document text
    • https://6bb2b61b-82bf-473b-8365-63ddb02ddbdd.filesusr.com/ugd/d55797_fe5a9cbcc8094d92b23600e7770df2d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/cp_company_cargo_shorts_size_guide.pdfIn PDF document text
    • http://tuguwobafadurot.rf.gd/20526167262.pdfIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_c2a41a7566a84633a680a90b3e946327.pdf?index=trueIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_f4f67c9199f04007a14561bb4856d2e7.pdf?index=trueIn 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_off0000efa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA7 5172 bytes
SHA-256: 2e429573f566ed9ef8fdfbaaac6aef6894349f7b5725898182b6ca7e38897235
font_01_sfnt_off0001012c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012C 11592 bytes
SHA-256: 767ae6ceaeae388d2c7e418f583c062fb71fe09212a2910417bcbaff97e9a397
font_02_sfnt_off00012868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12868 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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