Malicious PDF — malware analysis report

Static analysis result for SHA-256 536d29aa5d81c7cd…

MALICIOUS

PDF

75.8 KB Created: 2021-06-02 00:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 229f700b6c398b91e2dd2be0f314051f SHA-1: c0ae21026b185c30f06499a2a63695442143cfec SHA-256: 536d29aa5d81c7cd30a58beea04643a0092b55d0d7928e4df76b8d51c55dd8ea
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and PBworks domains, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://resalured.ru/wb?keyword=what%20does%20par%20q%20stand%20for', indicates a lure based on a search query. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://resalured.ru/wb?keyword=what%20does%20par%20q%20stand%20for
    • https://jukusixod.weebly.com/uploads/1/3/1/4/131483076/1335557.pdf
    • https://lexebovet.weebly.com/uploads/1/3/4/6/134628591/499385.pdf
    • https://nixalimug.weebly.com/uploads/1/3/2/6/132680811/9e479.pdf
    • https://vepidatebodosa.weebly.com/uploads/1/3/0/8/130874400/2841671.pdf
    • https://larebefol.weebly.com/uploads/1/3/4/6/134691273/5760750.pdf
    • https://namavikevak.weebly.com/uploads/1/3/2/7/132740743/sufar.pdf
    • https://vuzirokisex.weebly.com/uploads/1/3/4/5/134576988/rufozus.pdf
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/sobubuzepi-gozakija.pdf
    • https://naxibozagut.weebly.com/uploads/1/3/4/5/134580084/cc551a6.pdf
    • https://wivufazufurad.weebly.com/uploads/1/3/7/5/137505375/dofamigovubiva_rudolekasumo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://padimagofo.pbworks.com/w/file/fetch/144480513/32162592540.pdf
    • https://uploads.strikinglycdn.com/files/3fef3d3a-dfa5-476f-85e3-e35ace6b2ba5/is_gdp_a_good_measure_of_economic_performance.pdf
    • http://dejimebez.pbworks.com/f/minions_movie_480p_download.pdf
    • https://uploads.strikinglycdn.com/files/a1ed673c-0ca8-446c-b021-4f15c9fd0c20/jefubumulexipujewimo.pdf
    • http://nilanom.pbworks.com/f/bilderberg_group_members.pdf
    • http://dijakezepo.pbworks.com/f/81170022553.pdf
    • https://uploads.strikinglycdn.com/files/ae0e2aae-d987-423d-8e9e-99296ca0c099/35434069803.pdf
    • http://tukufidanega.pbworks.com/f/lanogubolosetugaditivor.pdf
    • https://uploads.strikinglycdn.com/files/6539b6d8-8e94-4136-9435-763edf8ef94b/debele.pdf
    • https://uploads.strikinglycdn.com/files/f4617b77-8d39-46d9-b75c-6664588fc228/jirozuvovasulujufuti.pdf
    • https://uploads.strikinglycdn.com/files/76436e8c-abac-4bbc-b06e-c2b42cdc15ff/57179556935.pdf
    • http://wisarazed.pbworks.com/f/how_to_level_up_fast_in_bloons_monkey_city.pdf
    • https://uploads.strikinglycdn.com/files/07ffb8f1-7072-4c17-acab-e1283b1bcd63/how_to_change_battery_in_schlage_keyless_door_lock.pdf
    • https://uploads.strikinglycdn.com/files/f6ce243c-b79b-4a11-b73c-ae20e1967b0d/jutifafume.pdf
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144456591/windows_2012_tail_log_file.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_off0000eb26.bin
d37ace4c0a5e5863aa51df8cd0fce647af8a9c970df768508aa697fa352dcb1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB26 5236 bytes
font_01_sfnt_off0000fcfb.bin
19eed6e19fa20763aaeedc5db878b09bf384659f41f77c767aab4760af9b69ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFB 10748 bytes

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