Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54ee64f9a2b6bb2…

MALICIOUS

PDF

65.8 KB Created: 2020-12-18 05:09:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f80a21a6909bebf43ff2c2b0c582579c SHA-1: ef49ff8e5ea0503fe93d63335c0ecf930d206df9 SHA-256: d54ee64f9a2b6bb2c196ed9cf15ef5d8f215a2afb318de839cf00fd82ff2aa52
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 0.9998

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 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://trafftec.ru/strik?utm_term=when+does+school+start+in+hillsborough+county+fl PDF link annotation
    • https://ruwuzeget.weebly.com/uploads/1/3/4/7/134755445/7808159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5fac5ff0736a5.pdfIn PDF document text
    • https://kojaresojew.weebly.com/uploads/1/3/4/3/134312518/bisuvok.pdfIn PDF document text
    • https://xezuzevujuniz.weebly.com/uploads/1/3/4/5/134586082/peropixedetig.pdfIn PDF document text
    • https://nolutoxut.weebly.com/uploads/1/3/4/6/134683805/nuvazeb_sofobenigerikim_tuzikibijumojev.pdfIn PDF document text
    • https://konibexik.weebly.com/uploads/1/3/4/5/134515119/2567832.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc10866e5c7695ca99c5cd3/t/5fd1dcd2ce71ee580faca86c/1607589074867/cross_wallpaper_iphone_8.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5677ef9866f3fd2f21712/t/5fcbdace190ee82df8e839da/1607195343135/while_true_learn_walkthrough_crowd_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86aeaa3c-5431-423d-89b6-66adc4f0ee7e/96288584671.pdfIn PDF document text
    • https://s3.amazonaws.com/moxekibupuru/rimumamuliruxuluka.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1c697bda9c57a97c4683c/t/5fc4561eeaf37e3b6426e553/1606702626278/how_to_start_a_credit_repair_business_in_louisiana.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf9d13ca23154c95b3949/1606220241821/www_eprintcenter_com_hp.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_off0000c06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC06C 5536 bytes
SHA-256: a19ac6195dd6acdd310b9ac9d3c1422da774c377d2414a16ef5df3513efc4099
font_01_sfnt_off0000d352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD352 11524 bytes
SHA-256: 27e356c2dadd01917e557f1779ad51bac41af4b94ba34f02d2b41bd2b4216100

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