Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee415e0192a6ab0…

MALICIOUS

PDF

79.5 KB Created: 2021-03-27 10:55:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2224b366f04f33e242d86d0a4ecca5f0 SHA-1: 6962ca1cc9aef0ebf5a3a4d5bb4bee3db36a8b76 SHA-256: dee415e0192a6ab0e5355a733a6265954bef885f56a96dccdd8cbfab89f6463b
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are on disposable hosting and utilize UTM parameters, indicating a likely phishing or spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://bologen.ru/123?utm_term=citroen+c4+2008+manual+pdf PDF link annotation
    • http://jibitivi.66ghz.com/bugulu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490273/normal_5fece68b0472a.pdfIn PDF document text
    • https://rejonogatu.weebly.com/uploads/1/3/5/3/135392998/lijarabukabokuxos.pdfIn PDF document text
    • http://tuvugisuxizew.iblogger.org/what_age_can_you_get_your_license_in_maryland.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493282/normal_605a435597023.pdfIn PDF document text
    • https://fosogizubosa.weebly.com/uploads/1/3/1/6/131637108/jibodutiz_mulonadura_selotuf_vojumo.pdfIn PDF document text
    • https://rumevupalod.weebly.com/uploads/1/3/0/7/130739773/supinejebaba.pdfIn PDF document text
    • http://penerete.66ghz.com/browsec_vpn_chrome_extension.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451941/normal_5ff086fa629a6.pdfIn PDF document text
    • http://santaparker.store/5259445882533gu4.pdfIn PDF document text
    • http://imm-shoes2.club/appium_scroll_down_android_ruby4rvps.pdfIn PDF document text
    • http://dashcamtopbest.com/30399642698b68y8.pdfIn PDF document text
    • https://pejudipevunasu.weebly.com/uploads/1/3/5/3/135351173/802355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_60170e7426527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446789/normal_602eb20856f8c.pdfIn PDF document text
    • https://dilipifoson.weebly.com/uploads/1/3/1/0/131070096/bugamogodadifepuw.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaledab.epizy.com/zuzawotexonebawiw.pdfIn PDF document text
    • http://mudotepejix.epizy.com/business_income_tax_rate_in_ethiopia.pdfIn PDF document text
    • http://wonumamirevaz.rf.gd/absorcion_y_transporte_de_nutrientes.pdfIn PDF document text
    • http://dimegebewode.epizy.com/16862539314.pdfIn PDF document text
    • http://fobapisarut.epizy.com/kotara_weather_report.pdfIn PDF document text
    • http://zegifuf.epizy.com/cartina_turistica_cagliari.pdfIn PDF document text
    • http://jezafilewore.epizy.com/kawopilomuvu.pdfIn PDF document text
    • http://tufuripisaren.epizy.com/rockman_x4_pc_full.pdfIn PDF document text
    • http://nesasodatujor.epizy.com/wovenusulofariku.pdfIn PDF document text
    • http://bupofisawum.rf.gd/motorola_s11-flex_hd_manual.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_off0000ef93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 1844 bytes
SHA-256: 1cc30aca5c7cd3f645673ce61da410a2487605eca11f8ea11a7e86294f7abdd6
font_01_sfnt_off0000f7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A6 5584 bytes
SHA-256: 9aeef68ea5eb33eff1117579a388cbd0614c82d0e72a42ffa4721eada51ddac0
font_02_sfnt_off00010a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A90 11056 bytes
SHA-256: bd3c7ac1f68b521ff655a714307c78e18119b84da2a67c0bb6a816688d874c84