Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda33722b8636580…

MALICIOUS

PDF

77.3 KB Created: 2021-03-04 16:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d31800a5f48409e57e015712de0d04e9 SHA-1: 4a4a4ac5bcb40b47a29f7ee56673d5c3f9a717b3 SHA-256: dda33722b86365805915c871986c28677bf8a3270db928e1417d2c6cfe075165
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan', and an ML classifier indicating maliciousness. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution scheme. The presence of 'utm_term' in one of the URLs indicates a potential tracking mechanism for a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/strik?utm_term=financial+management+theory+and+practice+11th+edition+solution+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/baduvezemu/g8pjbQi/56105905404.pdfIn PDF document text
    • http://myyshooop227.site/dragon_age_inquisition_official_strategy_guidenaa54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416802/normal_5fca4c8b8f7f0.pdfIn PDF document text
    • http://apkweb.net/dozugejumukozafovo00qy5.pdfIn PDF document text
    • http://omerkatanalp.com/tiposefivevivemopapasahtdpx.pdfIn PDF document text
    • http://atlas-copco.su/87552824728qlmm7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444351/normal_5fcd98138226a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486041/normal_601b3ef223d1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414161/normal_5fd805ad0c413.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/haiiZge/naroforolenopexup.pdfIn PDF document text
    • http://mazafaka69pussy.online/28808228526v9njp.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/azgcijg/small_modern_country_kitchen.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/jazFhgB/youtube_children_s_worship_songs_with_lyrics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2c624143-d300-4df7-80a8-fbf947e5c02f/25438223299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb925f03-6aad-4802-b4e4-832c80638639/gisekivosupibirumefunus.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/48819547910.pdfIn PDF document text
    • http://pubamawuxa.epizy.com/little_caesars_pizza.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/6679368369.pdfIn PDF document text
    • http://vivufetapowoz.epizy.com/murales_sobre_la_historia_de_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/ieee_transactions_on_energy_conversion_word_template.pdfIn PDF document text
    • http://waxusumuguk.epizy.com/math_worksheets_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/86356752459.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E0 5560 bytes
SHA-256: a13aac7bb25847c3dac97192f4c236c50d55fe5eea791a3ddcecef9781fac710
font_01_sfnt_off0000f49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 10548 bytes
SHA-256: dc17649e6df186f76b44bd3b821a6f5e97a35550d9f07e19d50c277f3297841a
font_02_sfnt_off000118a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333