Malicious PDF — malware analysis report

Static analysis result for SHA-256 8149d3fd31198345…

MALICIOUS

PDF

72.7 KB Created: 2021-03-03 07:47:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9d5a9f1d767d29b6fb4eb782cf30011b SHA-1: 9511435ca9c29b0e72ba26b47e6b09b76873e085 SHA-256: 8149d3fd31198345d2ae9469c5c0aabe6294d06458dda57b151dc05678723cbe
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary external URL, 'https://xezojetit.ru/123?utm_term=skyworth+universal+remote+code+chunghop', suggests a potential phishing or scam attempt disguised as information related to remote codes. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://xezojetit.ru/123?utm_term=skyworth+universal+remote+code+chunghop PDF link annotation
    • https://vuguzakinizole.weebly.com/uploads/1/3/4/4/134493236/xojetilanivam_fubovij_naponozidenuko.pdfIn PDF document text
    • https://gokivasinu.weebly.com/uploads/1/3/4/3/134334496/mejaduf-jolamarabu.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/newofogakab.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/450_vs_450_rancherxporj.pdfIn PDF document text
    • http://itslm.fun/little_house_on_the_prairie_movies_in_orderaeg51.pdfIn PDF document text
    • http://paganel.world/18917502027wzbcf.pdfIn PDF document text
    • http://okrasote.info/roomba_770_battery_life3ohxr.pdfIn PDF document text
    • http://tufepuwaw.iblogger.org/real_bike_racing_mod_apk_unlimited_money.pdfIn PDF document text
    • https://tolojosokuriw.weebly.com/uploads/1/3/5/3/135326177/moxuluges-nabexipi-dirijunolime-fomadojesabipit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wulagisi/fidoxumotuwagajapu.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/baaghi_song_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/46955426384.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/interview_guide_in_research_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/free_powerpoint_template_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/android_apps_development_tutorial_bangla.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/takayasu_arteritis.pdfIn PDF document text
    • http://pifajipap.rf.gd/99943502631.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_off0000e02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02B 5908 bytes
SHA-256: eb01d5c4c95a754264c15d3266710a51738b6089fcc552df46062cf3650ec6b9
font_01_sfnt_off0000f43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43F 9712 bytes
SHA-256: 2f889afdcc7636c873bd6dbeb732837a86d85d1440bdfe0364639adeaf86a926

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