Malicious PDF — malware analysis report

Static analysis result for SHA-256 f541008f53fc9c18…

MALICIOUS

PDF

90.8 KB Created: 2021-03-26 14:54:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b89c67bbea6c520ffbce4b181384b638 SHA-1: 76e775f305346960b94e037cacf0b0d5c754b423 SHA-256: f541008f53fc9c188c320a3bf7c5ccb504919ea4106499220d98e6a94aaf08c0
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain 'resalured.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a social engineering attack aiming to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://resalured.ru/123?utm_term=android+video+recording+example+code
    • https://cdn-cms.f-static.net/uploads/4383327/normal_5fd6f426ce0bf.pdf
    • https://cdn.sqhk.co/jexozumumanu/n57chiX/lufulilovur.pdf
    • https://static.s123-cdn-static.com/uploads/4495839/normal_6004d1d0bd4a9.pdf
    • https://cdn-cms.f-static.net/uploads/4418968/normal_600c06ff29ca8.pdf
    • https://cdn.sqhk.co/vakenuda/4HHjSjc/rune_pickaxe_osrs_ironman.pdf
    • https://cdn.sqhk.co/dudugetogi/3tjcjfO/juegos_de_speed_racing_pro_1.pdf
    • http://mamubisuk.mypressonline.com/les_miserables_broadway_2014_full_show.pdf
    • https://cdn.sqhk.co/mutobudenit/hgfz1eU/bhojpuri_video_song_awadhesh_premi.pdf
    • https://cdn-cms.f-static.net/uploads/4461481/normal_5fd1cb2d3dd20.pdf
    • https://cdn-cms.f-static.net/uploads/4466676/normal_600a3b5dadf27.pdf
    • http://rasezatoxefu.mygamesonline.org/medudupotafapogobolo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0a6a5c28-ad3b-4983-a738-c4dca4d31d66/what_transcendental_meditation_means.pdf
    • https://s3.amazonaws.com/dutimajizowa/how_to_learn_russian_really_fast.pdf
    • https://uploads.strikinglycdn.com/files/4be25cb5-94bf-4f17-a85d-241441380e16/international_usps_tracking_number_format.pdf
    • https://s3.amazonaws.com/zamemigojat/29569097791.pdf
    • https://uploads.strikinglycdn.com/files/aadb76a1-681e-4758-9cb3-ca554865e606/how_to_start_learning_sap_abap.pdf
    • https://s3.amazonaws.com/retobifulipo/answered_calls_resume.pdf
    • https://s3.amazonaws.com/xurixado/badmash_dil_song_singham.pdf
    • https://s3.amazonaws.com/wumodukubaru/zikane.pdf
    • https://s3.amazonaws.com/voxazedisula/khao_lak_travel_guide_book.pdf
    • https://s3.amazonaws.com/zurovajij/72702434259.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_off00012143.bin
da96dfc52a1985541317b4f30857c69948dce83a0f29a971427afe3491a46ea1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12143 5332 bytes
font_01_sfnt_off0001335c.bin
05739573eb5207a188355197b589cc8942ace01bceea4112e11ac181ea132999
pdf-font-stream PDF embedded font (sfnt) at offset 0x1335C 13036 bytes