Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb19cf4ddcec065…

MALICIOUS

PDF

74.2 KB Created: 2021-03-08 21:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dc46c5b70dfc476efb97380144706166 SHA-1: b504227d6ecb9cfd5c4d188bec701bb11de92401 SHA-256: edb19cf4ddcec065a434b6818f1f2535426b3c57ffc344760cbf39426461cc3a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/aws?utm_term=dell+latitude+e6540+screen+resolution PDF link annotation
    • http://sugameloxufe.mywebcommunity.org/acura_maintenance_code_a13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418762/normal_6030a0b30bf76.pdfIn PDF document text
    • https://cdn.sqhk.co/dodagirojep/UDzidFg/kung_fu_panda_4_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/madilaxetevo/Xiajen6/jupedexubo.pdfIn PDF document text
    • http://replyua.site/63319457889mw67q.pdfIn PDF document text
    • http://duwudivusupo.mygamesonline.org/cloud_computing_advantages_and_disadvantages_wikipedia.pdfIn PDF document text
    • http://gitixitevusud.22web.org/logitech_g710_gaming_software.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422145/normal_5fce8d04c5d96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455681/normal_603e6c5a8e385.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/tevenoluxitivumapirawojap.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/Ehgazaq/zukesemegewezanu.pdfIn PDF document text
    • http://puwufonizezez.22web.org/xbox_360_afterglow_controller_not_working_on_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/kelulegawi/jQhggg4/33624243366.pdfIn PDF document text
    • http://vedice.ru/79826411529yavpr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nofalowi.rf.gd/beloxikomimogotezogofev.pdfIn PDF document text
    • https://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_097c5d31caa443bea2776cdd8160dcb1.pdf?index=trueIn PDF document text
    • http://rujidafedisezu.atwebpages.com/time_of_contempt_explained.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/32436180170.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_074efbde51d1495292295b981223626a.pdf?index=trueIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_1cede5ae9fe2497f887a754235f08a0d.pdf?index=trueIn 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_off0000e419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE419 5440 bytes
SHA-256: 211e1c4bc519cea56950d9ed8786e629f8fd9a3fb118837409a06eb8dc8ddebf
font_01_sfnt_off0000f6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B6 10652 bytes
SHA-256: a3a433f64e9cac25e46206d4048dec16c90a859a9bb15943b9550e5afc32f491

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