Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eda081a2c0bffad…

MALICIOUS

PDF

83.2 KB Created: 2021-03-12 01:37:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 8a25fd1918c10e6051ee867a5cdafc9e SHA-1: 922077d2d2074c3a7e1c7bc52717f2d55f74063f SHA-256: 5eda081a2c0bffade0a1b2ac696d3b92b581b856f80049a2eb867feed787923f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a high number of external URIs, many pointing to disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary malicious URL identified is https://fokemale.ru/award?keyword=metal+cutting+theory+and+practice+pdf+free+download, which is likely used to deliver a secondary payload or redirect to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://fokemale.ru/award?keyword=metal+cutting+theory+and+practice+pdf+free+download PDF link annotation
    • http://accueilcmb.com/9_months_pregnant_baby_not_moving_as_muchbn0jx.pdfIn PDF document text
    • https://fusagepewaliwe.weebly.com/uploads/1/3/5/3/135325652/6ab45ab892e4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475565/normal_5ff584b55f559.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/jiCJdgh/article_about_technology.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445324/normal_6015e11ece96e.pdfIn PDF document text
    • http://winoorama.website/fijazedelasarevuxewilov1pihi.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/iijjjge/86047469141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463529/normal_603b592ecc70a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489740/normal_5fe2503523b53.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/iiiggfN/cramped_spaces_love_it_or_list_it.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488569/normal_5fcaab846dd0c.pdfIn PDF document text
    • http://study-english-05.site/fios_tv_remote_volume_not_workingcsl8u.pdfIn PDF document text
    • https://xazulifego.weebly.com/uploads/1/3/4/7/134727283/bozojabafofolopopi.pdfIn PDF document text
    • http://freshnatur.fun/puzzle_bobble_switchte3lj.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/c4e6a74a-c2c3-4a17-b5be-3f2f23570595/27181708898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe76d56e-7de1-4a15-a893-1b0654f10ce8/62162281177.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/badmaash_company_hd_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/siwixomudit/biodata_format_for_college.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/dugerafo.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/impossible_quiz_question_36_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac7c9354-c9f1-4298-bb51-8bac2d76076c/dont_quit_poem_translation.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off00010615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10615 5436 bytes
SHA-256: e9236d67bb785dc6b427f520cfe16dc6c923beeeaeab04e6c1a18106202d53b0
font_02_sfnt_off000118b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B3 10388 bytes
SHA-256: 26557c7dfe647a9a14eceffea98918254dcf81dc028252d2a39f96dc12089482