Malicious PDF — malware analysis report

Static analysis result for SHA-256 b832efb101f970df…

MALICIOUS

PDF

70.2 KB Created: 2021-03-20 23:39:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 68497132dc6aab1507ab5c25c7b38a71 SHA-1: 522f534717b672f03c071d06d4c8e88f5c4bd83d SHA-256: b832efb101f970df578f3acde1208f3fa43afeaa8cd3648ad3b7ece26ae3a5ea
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and a high ML score indicating malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this. The primary attack pattern involves directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gimoguvi.ru/wix?keyword=clicker+universal+garage+door+remote+manual PDF link annotation
    • http://nijalatol.mypressonline.com/organic_chemistry_basics_in_telugu.pdfIn PDF document text
    • http://snapchat-alert.com/telikin_computer_user_manualpgth4.pdfIn PDF document text
    • http://dombitarf.ru/1125804164jdw0y.pdfIn PDF document text
    • http://roskycnmx.com/tijofuziditebuxutogi0tyx2.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/45167044164.pdfIn PDF document text
    • http://danoguvokapijof.medianewsonline.com/warhammer_40k_tyranid_codex_download.pdfIn PDF document text
    • http://naturaitalia.space/digikutezasoduxoideu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454807/normal_604e3b1a5b7ea.pdfIn PDF document text
    • http://bottlechainworld.com/61630072067vwzkd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479213/normal_6041076f9fffe.pdfIn PDF document text
    • http://copyrights-notices-helps.com/jegevawolebexovizooftlh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5fd9c205421e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368222/normal_5fcb0201a5ae7.pdfIn PDF document text
    • http://lumacy.site/litcharts_crime_and_punishment_part_6zlhpj.pdfIn PDF document text
    • http://mscredit.info/highway_to_hell_movie_1991r2agn.pdfIn PDF document text
    • http://getdouche.xyz/79561623324eezin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lokopusigefof.epizy.com/wivalejirolususu.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/jawugutisogorek.pdfIn PDF document text
    • http://bosulug.epizy.com/event_management_html_template_themeforest.pdfIn PDF document text
    • http://gozuketitara.onlinewebshop.net/bixami.pdfIn PDF document text
    • http://riveminigokoxa.myartsonline.com/botozedevodusefi.pdfIn PDF document text
    • http://tewidunutazi.rf.gd/can_mice_climb_sheetrock_walls.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/kaththi_full_movie_in_telugu_dubbed.pdfIn PDF document text
    • http://pikumupibo.epizy.com/78835900652.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/jipemupizelonosuwilo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD524 5288 bytes
SHA-256: 0601cf44abd87aa16a756a009294d1c66de4fa6bad02d191b1e0dc86a4aafc83
font_01_sfnt_off0000e711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE711 9852 bytes
SHA-256: 5b5765922cd7fb3c9f0462602e9574ca8ea4a7128ce4e6cece317aebd6f10810

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