Malicious PDF — malware analysis report

Static analysis result for SHA-256 73a65a10357d4f09…

MALICIOUS

PDF

85.1 KB Created: 2021-06-07 05:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b5bae082c010ad757df2f34bc06d33b0 SHA-1: bc66aa2cfba9100319d3d2c9f04f9ef238cd79d5 SHA-256: 73a65a10357d4f097893d6d8adf76fed9f5065b9740013b1b8c1765d3b5cb2a1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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 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://nipisod.ru/123?utm_term=manual+template+ppt PDF link annotation
    • https://kusuxifitumaka.weebly.com/uploads/1/3/4/5/134593182/gugeketigunep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486367/normal_5ff918541122e.pdfIn PDF document text
    • https://xodukibefapox.weebly.com/uploads/1/3/0/8/130873769/cffcf18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380072/normal_6026fb0b1a4c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_60304f2d2a5a2.pdfIn PDF document text
    • https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/fanorozoteregajud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495043/normal_5fca652fd5d3c.pdfIn PDF document text
    • https://kovunigok.weebly.com/uploads/1/3/5/3/135317038/setabemade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_603fb25b949b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487186/normal_606e1b6e758a2.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4389085/normal_60b33fa22cbed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceedfc83-1494-4261-8c60-fa022b53ad96/murachs_oracle_sql_and_pl_sql_for_developers_2nd_edition.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/f/43073356168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6143dae8-e2d4-4240-975d-69a295bd081a/twilight_movie_free_download_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b17c45-2a73-42b4-bd90-30bcf0d29eb0/70228834080.pdfIn PDF document text
    • http://vejivab.pbworks.com/w/file/fetch/144462039/45927496941.pdfIn PDF document text
    • http://tusawijer.pbworks.com/w/file/fetch/144748944/brady_bmp21-plus_troubleshooting.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/f/zifaxuwopavuton.pdfIn PDF document text
    • http://jujupaw.pbworks.com/w/file/fetch/144543804/97531655625.pdfIn PDF document text
    • http://zuvuzut.pbworks.com/w/file/fetch/144622560/kebomugawerutup.pdfIn PDF document text
    • http://minuwaxiper.pbworks.com/w/file/fetch/144631086/47138341238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb82ad1e-36ff-4d5b-9edd-e82d7b449051/whirlpool_washer_top_loader_where_to_put_detergent.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11301 4696 bytes
SHA-256: 80e5488867930413d1f0f908fa7da37b4869d08c3614e71ac53e14421c2895af
font_01_sfnt_off000122f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F7 10676 bytes
SHA-256: 20142e60bd924f45db418afd1ab609b9e8d0cb992cd3f83feeb75d36db1d74d8

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