Malicious PDF — malware analysis report

Static analysis result for SHA-256 599619440c75cc61…

MALICIOUS

PDF

76.8 KB Created: 2021-04-01 14:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6c2626f0dfc1a6c89193cfac31ad3978 SHA-1: 19b9f4f49c647d24f79afceecde8b0f47b63b15c SHA-256: 599619440c75cc61e17cd5a267183f139e3caac00c4762a9095632e38c0680d2
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 0.9993

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 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://xezojetit.ru/strik?utm_term=proform+le+tour+de+france+upright+exercise+bike PDF link annotation
    • http://jepenufi.getenjoyment.net/aeronautical_engineering_syllabus.pdfIn PDF document text
    • https://zurejekivob.weebly.com/uploads/1/3/0/8/130813755/1a3f3cd021a4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369797/normal_5feb93e13cd40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369306/normal_5fe0da794cc18.pdfIn PDF document text
    • https://gajaxaja.weebly.com/uploads/1/3/2/7/132712369/8202176.pdfIn PDF document text
    • https://cdn.sqhk.co/moranunemuk/Z733Jih/14063482305.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/gghqIji/valek.pdfIn PDF document text
    • http://jonipifenukiz.mygamesonline.org/47738414122.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/how_much_does_a_western_snow_plow_weigh.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/80124991486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407756/normal_605d8d579de24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378620/normal_6038bd812b29b.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/diiQhcf/65771400390.pdfIn PDF document text
    • https://towirakupafa.weebly.com/uploads/1/3/4/5/134595516/3178212.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483864/normal_5fdea605e3bbc.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/036bc62e-2c11-49dc-b031-69432517c503/basazazivagufubefixa.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/bethel_music_albums_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a3ca147-955e-4261-8ded-42fe8cb14fda/devi_bhagavatam_sanskrit_and_english.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/vojivu.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/83609689740.pdfIn PDF document text
    • http://jarepumemaxi.onlinewebshop.net/applet_in_java.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/data_communications_and_networking_5th_global_edition_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b443534-68b3-4a97-a259-112b575bc83b/oreck_xl21_belt.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_off0000ee68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE68 5844 bytes
SHA-256: d9b75bace9de1c908d171c23642b8c4db4a60b30a2e03f135804d954dc913104
font_01_sfnt_off0001021a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021A 10424 bytes
SHA-256: ca63a3558c9ed7f5b640dfff84112f2b6d5ef6bff8da6ef02a513945170182ea

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