Malicious PDF — malware analysis report

Static analysis result for SHA-256 659864414f089d68…

MALICIOUS

PDF

74.2 KB Created: 2021-03-24 01:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 815cd38d8712ab55e1c61c31cdb362b9 SHA-1: 5efc4cf93d24dd0d7a1f4e017df8515997f30d33 SHA-256: 659864414f089d6856d2c9c6224f9f6fe9525a326b67b01767daff9ecc4d2981
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-optimized and lead to other PDFs, suggesting a link farm or redirection scheme. One prominent URL, 'https://leonvi.ru/wix?keyword=how+to+get+free+fifa+points+fifa+mobile', indicates a lure related to in-game currency. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=how+to+get+free+fifa+points+fifa+mobile PDF link annotation
    • https://radasezase.weebly.com/uploads/1/3/4/6/134643415/loxiwuw.pdfIn PDF document text
    • https://pisolapep.weebly.com/uploads/1/3/4/6/134648883/donijefok-fafex.pdfIn PDF document text
    • http://ijmalan.xyz/karma_guide_s9_midysqfh.pdfIn PDF document text
    • http://strapslap.online/funuvenaziwt4p.pdfIn PDF document text
    • http://mxsale.info/skripsi_akuntansi_biaya_produksi5ee35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/julexekubaj/jebumebaraviwegil.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/best_kennedy_center_honors_performances.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/barnegat_bay_fishing_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f47109b-2cb4-4619-915d-a17b1da8bcbf/lajuzev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f2f25d5-288a-4dec-83da-84eb373eaa50/what_are_the_main_theories_of_motivation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ebada7-7891-490a-ab97-7bef1e08c72b/resigavaxovuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac544e68-0fee-45f2-a95f-4cf6441e8ce7/sapen.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/battle_cats_hacked_save_file_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc74493-251f-4c42-bcf2-6937a88a7211/marathon_watch_military_discount.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eeac50d-10ba-4910-a2c4-8c6af6e37dd3/migowe.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/borderlands_the_handsome_collection_ps4_trophy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0fc8595-8f42-4173-a3d1-dfc513bfda18/14883156707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0bcb1a4-e6fb-4729-83ff-df27a41cc97d/verb_forms_list_with_meaning.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE99 5204 bytes
SHA-256: 692a77eeb7a599f7b7727d49385e16572aa3b51cf25a7a519ef8cf6fbd9c1566
font_01_sfnt_off0000e036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE036 2092 bytes
SHA-256: 6e5de5c6bcb7fdd8c5ca0d25823a8f80e6c764803c1b732dbc9c425a5c0f8ea5
font_02_sfnt_off0000e9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DC 10352 bytes
SHA-256: fada7100b3d57d17109e8052066548a97e366d9308b5f1a6ac98cda026fec44a
font_03_sfnt_off00010cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFD 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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