Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d3e307a0a847c1…

MALICIOUS

PDF

84.2 KB Created: 2021-05-24 02:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 020bef09ae000f172c3196e23f15d341 SHA-1: 86be8c147e1159e8c588ed7161a56fce6f52dc22 SHA-256: a2d3e307a0a847c1e836b24258eefc5da52d20de32565984ca7b094dfb579f38
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it is part of a link farm designed to generate traffic. The primary external URI points to a suspicious domain, 'baarspo.ru', which is likely used for phishing or malware distribution. The ClamAV detection also flags it as a phishing trojan, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/strik?utm_term=grimorio+de+abramelin+pdf PDF link annotation
    • https://leresidatebij.weebly.com/uploads/1/3/0/7/130776374/mibofopogiduvez.pdfIn PDF document text
    • https://wewowalowumuv.weebly.com/uploads/1/3/4/0/134040384/nisisipawix_kafazojo_zujiv_fuxafi.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/teriwakazuw-fovosajunexus.pdfIn PDF document text
    • https://wumudirega.weebly.com/uploads/1/3/4/5/134515906/25c5427792a0.pdfIn PDF document text
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/1c5c21a2b909c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wefadep/singer_5830c_bobbin_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/boundary_definition_in_information_systems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b8dff1f-0900-49bd-b9fc-bfec0bd9f8fb/can_quantum_physics_help_in_time_travel.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/adobe_spark_apkmirror.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/deepika_malayalam_calendar_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a7e3f2e-0962-401d-9e8b-a941bd2e0ec0/service_de_conciergerie_virginia_bergerac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24eba9bc-4040-4319-b12b-4dbfa9d95222/what_happened_to_ron_and_hermione_in_the_cursed_child.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4ba7e6-12a9-4030-aead-b58a269ffa14/wilumaxiliwosase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b2a447a-e4ae-41dd-8ed2-2e31824e21da/what_does_a_pacific_tree_frog_sound_like.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb751b1-9936-44a7-b62c-a67dc226d212/how_long_does_it_take_to_read_the_magicians_nephew.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/the_adventures_of_sherlock_holmes_tv_series_jeremy_brett.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/bharat_ane_nenu_movie_trailer_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aa0d3d5-d9f5-42d4-aa7e-f2cf5d4b25c8/rain_bird_esp-6tm_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/73523093591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1da1afcf-7ec1-4342-9b29-20aa62c74878/diary_of_a_wimpy_kid_wrecking_ball_book_to_read.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/affafaa4-5bb4-4d46-ae5b-7f0bfd3d7022/tenidajimefujixiniro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fbb29e4-896b-4128-aec9-acea12812e49/89196562766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26c38f8e-1cdd-4f32-a8ab-4cb1a0a8b81f/what_new_civs_are_in_gathering_storm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9292e697-6ee3-4458-b1b5-5ab188cc6914/short_best_friend_quotes_copy_and_paste.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_off00010837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10837 5180 bytes
SHA-256: 6e177546db3ce74f2d86010f02ac28f6c11585128e869c3e87be9f62a4b853e9
font_01_sfnt_off000119b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B8 13732 bytes
SHA-256: c8b0b970361f83a7b8e9badfecd27b032ef8c2cef0b185d6ce805ffb74c71e88