Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd314a7039c36cd…

MALICIOUS

PDF

83.9 KB Created: 2021-03-11 05:54:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b25b037ffb658e03cdb0b31d2a4d2618 SHA-1: b48a7a159e228a842a1d5414f5eb5d35ff76ddeb SHA-256: 0fd314a7039c36cd583d412f22e8a83674dd636c3d5485304743c3a01e7c4fd0
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, identified as a link farm, designed to direct users to various websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=atalanta+calcio+formazione+titolare
    • https://cdn.sqhk.co/lanuniwa/XROhf5H/international_superstar_soccer_2_gamecube.pdf
    • https://cdn.sqhk.co/rasufizo/STiiejh/smart_tube_light_price.pdf
    • https://cdn.sqhk.co/xejudawadoni/Tjjifwz/48850638269.pdf
    • https://cdn.sqhk.co/kisereta/M0ghyja/febozorivisixexiradaki.pdf
    • http://siputofivimib.iblogger.org/free_bluetooth_for_android_phones.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xuzakob/cars_2_tamil_dubbed_movie_isaidub.pdf
    • https://uploads.strikinglycdn.com/files/0b510d8d-6bbd-49aa-a489-475ee34d9ab8/46668415510.pdf
    • http://nifopufu.epizy.com/microsoft_visual_studio_format_code_shortcut.pdf
    • https://s3.amazonaws.com/tawosutosuxi/blackberry_9900_latest_os_7._1.pdf
    • https://s3.amazonaws.com/dotivaf/71868612438.pdf
    • http://nosajesu.rf.gd/79885642455.pdf
    • https://uploads.strikinglycdn.com/files/2b934cca-0d06-4ff9-9b7d-d63e70066a6d/9689570551.pdf
    • https://s3.amazonaws.com/wogikokuzotaxa/public_relations_dictionary.pdf
    • https://uploads.strikinglycdn.com/files/ada29541-e695-457c-9815-dec87316dd10/zoguzaxuki.pdf
    • http://gexazavere.epizy.com/20708864386.pdf
    • https://s3.amazonaws.com/zetituri/nordictrack_2450_vs_x11i.pdf
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_044df6eacb69483bbf008076d77af488.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3a97aac5-0209-4bae-b8a8-1b9c17f0a8e7/saffire_pro_40_catalina.pdf
    • https://s3.amazonaws.com/moduxanakuri/jupagusakumetatunazujar.pdf
    • http://vuruwabudakase.epizy.com/armed_heist_mod_apk_1._1._19.pdf
    • https://uploads.strikinglycdn.com/files/bfb96c5f-ecec-4c70-8cae-9d04fa4454eb/original_dd_classes.pdf
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_010e19e1c94540dd95fc7ac60f34e25d.pdf?index=true
    • https://s3.amazonaws.com/numegubowalonan/first_aid_step_1_2019_vs_2020.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fde2.bin
03223cfa170500ef786d9fdb75ce22db42c489132723cb06b2b7f4933805bab3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE2 4888 bytes
font_01_sfnt_off00010e71.bin
a281f397b83cc3fc388d66d2a349cefdaaaad68b61c4de0da74642fbd17b26e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E71 16636 bytes

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