Malicious PDF — malware analysis report

Static analysis result for SHA-256 945d3df536d5b244…

MALICIOUS

PDF

82.1 KB Created: 2021-05-26 09:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7ba6b5c2fa2d820ade52759eabd9cd1e SHA-1: d5c01addea4fbc869b5b05ab0b0e0547a6175446 SHA-256: 945d3df536d5b2449f74a369479d5dd99eafd6ea20faf1b377a1c99a2eb464ce
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external URIs points to 'resalured.ru', which is likely part of a phishing or malware distribution campaign. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/strik?utm_term=farewell+speech+for+college+students+in+bengali PDF link annotation
    • https://tenekitu.weebly.com/uploads/1/3/4/0/134018212/kudewejidavow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422637/normal_5fdecd713f874.pdfIn PDF document text
    • https://surevasod.weebly.com/uploads/1/3/1/8/131856145/6ce5ac49be2466.pdfIn PDF document text
    • https://fakazurirogedim.weebly.com/uploads/1/3/4/7/134743668/3604581.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449788/normal_5feb5594d4292.pdfIn PDF document text
    • https://sewigidafison.weebly.com/uploads/1/3/5/3/135316790/e9bf00a9b843.pdfIn PDF document text
    • https://runuxufugax.weebly.com/uploads/1/3/0/9/130969308/74eeb84f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492275/normal_600103f59d24f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a17f4c8-8d09-4b54-905d-420c4ad063df/manual_compacto_de_gramatica_da_lingua_inglesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e02ead89-21f4-4b0e-8d89-1dcb42edb56c/how_to_use_a_sodastream_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c078bf44-df14-4b31-875e-49ef4e5a706a/circo_de_la_chola_chabuca_2019_direccion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/919c71e8-1a9b-4d5c-b637-3dfb91bffe17/all_souls_catholic_church_walnut_avenue_south_san_francisco_ca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b68e3631-e308-4415-9669-db516acfa32e/god_of_war_2_android_game_apk_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1041459-cb69-40b9-a517-7cd398ee3513/4_pics_one_word_level_2360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdc0c0ad-1215-44a7-9b0c-86a0fa7e779e/bemugoludadozijikepuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b03832ec-ce98-4116-80fa-6fce93a7244a/midi_to_usb-c_adapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f543ff7-0122-48a7-aff1-33a4f4fc575c/how_to_unlock_sentry_safe_without_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa17dc97-d2de-4f35-9956-289baf911224/xowimoxazebitisakijaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf353d90-6355-4940-910f-91c5a3dddb2e/does_the_us_navy_have_a_base_in_germany.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375a0cee-4bc9-45bf-b17b-cf87faa449e0/top_boy_season_3_netflix_release_date_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d7b3106-c4f0-406f-913e-6031a80a6904/51615653362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/180cc620-cf61-47db-b436-fb3ed8e581ab/first_grade_common_core_reading_worksheets_free.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_off000100db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DB 5604 bytes
SHA-256: e1d7a655c4506fc3158bf8a0272219f1167b14aa2416ab6b93fdf39e36468fb4
font_01_sfnt_off000113f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F2 11468 bytes
SHA-256: b0e4cc83e5c65e1357b5d0350eaaf9d3931bfab194296a331e1c2dbb3b868f56