Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ff8a4246318ff48…

MALICIOUS

PDF

74.3 KB Created: 2021-03-25 05:27:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85dae90712771e9879bac4ee09447cb0 SHA-1: 229da6fe5a2b7ddd25855c13de72ebb46cafabf0 SHA-256: 6ff8a4246318ff48766b47cc51e04d56195ede93833eb8756baf4f1b94557e2f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a phishing or content-farming scheme. The embedded URLs point to potentially malicious domains, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=how+to+start+husqvarna+150bt
    • http://pedrons.space/what_does_the_yellow_dot_on_my_snapchat_story_meanlboqn.pdf
    • https://cdn.sqhk.co/gobejilu/mvngfwM/45551104589.pdf
    • http://tekplafond.xyz/asus_rt-ac68u_firmware_restorelmy9x.pdf
    • https://cdn.sqhk.co/jemedolena/cDhggcN/gibazatuguxi.pdf
    • http://my-favshop.online/70978286090ri2wr.pdf
    • http://jnatural.space/quran_in_english_online_shoppinghwtwa.pdf
    • https://xilamebi.weebly.com/uploads/1/3/4/5/134598653/a52a381.pdf
    • https://ganupedudajoz.weebly.com/uploads/1/3/4/5/134586443/4893263.pdf
    • http://rivalo130.com/is_network_plus_harder_than_securitywawqa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/resabomibogodaw/bronchite_aigue_traitement.pdf
    • https://uploads.strikinglycdn.com/files/9f991b65-5142-4394-9955-8edc865070e0/musiwinixugapa.pdf
    • https://s3.amazonaws.com/pafiganovavi/75815514640.pdf
    • https://s3.amazonaws.com/kavifunaruvi/az-_500_study_guide.pdf
    • https://s3.amazonaws.com/fosalizuzu/singham_song_pagalworld.pdf
    • https://uploads.strikinglycdn.com/files/1daf5263-c65e-4b49-aa71-065c1200294c/33432128787.pdf
    • https://s3.amazonaws.com/gupojakami/eclipse_java_ee_developer_tools_plugin.pdf
    • https://uploads.strikinglycdn.com/files/e05a4dcf-cd71-4205-a8d3-fae004200ea8/what_does_bad_blood_mean_in_english.pdf
    • https://uploads.strikinglycdn.com/files/5b7ba302-b77c-4a57-b7e0-9e7e09fd0a4e/29398733175.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_off0000e208.bin
9695a036f07e2c7d7afe634b031de41df9a39ec1078d4f7508d9e08e04ea6459		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE208 5436 bytes
font_01_sfnt_off0000f4a3.bin
dc14849583e660277d6aacd1f3b4fe3e493328aab913308443f6a36be4b7290f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A3 11072 bytes

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