Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df3ab8499c5169d…

MALICIOUS

PDF

73.3 KB Created: 2021-04-06 20:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e588b592086e22c50f57d5ac0e18b2d0 SHA-1: 8e143082c891224b25b0fa64f08fe416c5a59fbf SHA-256: 4df3ab8499c5169d94c9a08ebf8325e849e03910a991ed5160171066e8ffdb5d
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 0.9997

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 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://jumiwimov.ru/wix?keyword=speed+problem+worksheet+1.3 PDF link annotation
    • https://cdn.sqhk.co/xadeviro/YUy9jbj/88653237413.pdfIn PDF document text
    • https://fanarise.weebly.com/uploads/1/3/4/3/134377412/cd879bae.pdfIn PDF document text
    • https://cdn.sqhk.co/venifirub/a8hcggE/mother_earth_news_magazine_change_of_address.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378171/normal_606a88a9573a2.pdfIn PDF document text
    • https://mexasazage.weebly.com/uploads/1/3/4/5/134513067/7686739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390374/normal_6035844ce3704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460723/normal_603d0ffa28d1f.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/gibjbjg/b._o._o_full_form.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/Javcjef/zitewikudanobowapaf.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/ajggwid/craft_legendary_weapons_fallout_76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499999/normal_60568ddd09e20.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/nuselufuzo/power_air_fryer_review_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/appendix_1_vaf4a_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/17917983011.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/wabut.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/hot_air_balloon_full_hd_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/the_benefactor_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/water_cycle_worksheet_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/81856215220.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/jabugalake.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_off0000dfe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE8 5636 bytes
SHA-256: 77c7018d8c972190758660c0a8369eff50b523aeb6d3a11f5e757ca56f52585f
font_01_sfnt_off0000f2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FF 10932 bytes
SHA-256: 86247efbde73a68b8c29fca0211dac410cc586fce105d98f690cba6ab1ea916d

Open this report in the interactive analyzer, or submit your own file for analysis.