Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ae7fd95d27dc6e…

MALICIOUS

PDF

69.8 KB Created: 2021-05-15 09:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e2bdcb18b220374c7db6e31562eecea6 SHA-1: 10714ed6a25bd6e3cdf056e1b68924ae6ddf208f SHA-256: c6ae7fd95d27dc6ea1a75eda514b2f97b24c260878a8f383937bae7266cb5c80
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-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://mezovuduw.ru/strik?utm_term=whirlpool+refrigerator+parts+meat+drawer PDF link annotation
    • https://dawasaga.weebly.com/uploads/1/3/0/9/130969366/4201163.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/38214919237.pdfIn PDF document text
    • https://goradexajegofip.weebly.com/uploads/1/3/0/8/130874122/nokadokodaxirukumima.pdfIn PDF document text
    • https://kutekedutowake.weebly.com/uploads/1/3/4/6/134635623/rokimataj-zukibujexago-pemaresixopigi.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/nijosinizo/annual_report_kino_indonesia_tbk_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/what_is_work_environment_measurement.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/vovosuxetatemedax.pdfIn PDF document text
    • https://48e6b720-b653-4920-beb0-7ef171ab6ab9.filesusr.com/ugd/d9d1f5_278a155d426444db88f6907fe005eb19.pdf?index=trueIn PDF document text
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_4037e76480a643e6a81fabf30a1e236e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a905e32-e89a-4425-8508-2e5989d01630/nixon_watch_battery_size_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/what_is_management_consulting_like.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e8430ed-3af6-4e93-8d38-a0d858715f7d/88955512457.pdfIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_4441fb8c6c4e4dcc8610b7959ad7982d.pdf?index=trueIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_620b3dedd78a499b977bd6c0e90b953f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/molavipigoferafomu.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/ldoe_guidebooks_4th_grade.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/bernard_werber_les_fourmis_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/railroaded_richard_white.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/dorafakosefedadizedo.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_off0000d2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E2 5560 bytes
SHA-256: bd1085cb70063ac91338b7f594a3a7716da74d8cf1807ac521d38b6adf5221cb
font_01_sfnt_off0000e5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BB 10644 bytes
SHA-256: 9fc3035ca3abd9ce54420e1a6914fbcf0fa822c1d97c6fb1f36834faa6199477

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