Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cadc392fb935079…

MALICIOUS

PDF

82.6 KB Created: 2021-03-16 06:04:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3e1583f2fa1ff464a480611211f955cb SHA-1: bb08f5ddec8c4023eb7ffa4ece930423f75f0d3a SHA-256: 0cadc392fb935079811e9e03a58e81d58110e418593ed2e9ecd8bbcc4858c16c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites for further exploitation or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://xajibur.ru/123?utm_term=bubble+bobble+double+for+android PDF link annotation
    • http://welitizenowem.mywebcommunity.org/62043784889.pdfIn PDF document text
    • https://pevopuxavinedun.weebly.com/uploads/1/3/1/4/131406680/83614f.pdfIn PDF document text
    • https://vidujari.weebly.com/uploads/1/3/4/8/134858315/gafab_bisiboriwi.pdfIn PDF document text
    • https://dimazemoredexi.weebly.com/uploads/1/3/5/3/135309177/4461177.pdfIn PDF document text
    • https://nijuvijoz.weebly.com/uploads/1/3/1/4/131408832/puledegogiwe-leribufigupuxe-pulepag.pdfIn PDF document text
    • https://sanexopapodepal.weebly.com/uploads/1/3/0/7/130739353/jimavaguke.pdfIn PDF document text
    • https://lonupuvajofova.weebly.com/uploads/1/3/4/3/134341927/jukavup.pdfIn PDF document text
    • http://movizopolu.medianewsonline.com/87098505020.pdfIn PDF document text
    • https://sekitajed.weebly.com/uploads/1/3/1/3/131383533/9018388.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://worutigije.epizy.com/21675847835.pdfIn PDF document text
    • http://jakosorer.epizy.com/avery_labels_22806_template.pdfIn PDF document text
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_014f42409ad94a17981fe4f5f6446273.pdf?index=trueIn PDF document text
    • http://lilivuxaja.rf.gd/49015575496.pdfIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_1e43e8d48627444f8b46aee48ccb952e.pdf?index=trueIn PDF document text
    • http://nunoxemimo.rf.gd/29467724999.pdfIn PDF document text
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_496dfcab4ce14d319a88f40cfaf02056.pdf?index=trueIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_810ec28176ba42b79a86c653acfed8a9.pdf?index=trueIn PDF document text
    • http://kubegixojarabax.epizy.com/2014_chevy_spark_car_manual.pdfIn PDF document text
    • http://novuzebires.rf.gd/90863183879.pdfIn PDF document text
    • http://zorijefugixor.atwebpages.com/99204723303.pdfIn PDF document text
    • http://dabemekos.epizy.com/accf_aha_guidelines_for_cabg.pdfIn PDF document text
    • http://pesafitibum.epizy.com/foledusibuno.pdfIn PDF document text
    • http://jirarawoxi.rf.gd/videofx_music_video_maker_mod_apk.pdfIn PDF document text
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_4494164d0bba42ebb4e679a9950d51fb.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E2 4016 bytes
SHA-256: 1c64f919f45b6b1d699c110b133692efeb7f339e0b24ddd97449d8f669458d0b
font_01_sfnt_off000105f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F3 4912 bytes
SHA-256: bd9e8601c1fdea00fe3f82fa354a4dad9270c7c6afb73c5392b699fb7048a575
font_02_sfnt_off000116b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B5 11000 bytes
SHA-256: 29e2b0a518120d31399413d5d03230ebe2658a69e8ccdeb997f8264631fb44e4