Malicious PDF — malware analysis report

Static analysis result for SHA-256 253125e790786aa9…

MALICIOUS

PDF

80.6 KB Created: 2021-05-08 08:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ecc07f40b3438b9ac98822a749910cd2 SHA-1: 3f7d25678bf29ea425d096e9de056dac0603e168 SHA-256: 253125e790786aa95cd7ee6790d9ed5d63f978b31ac814a60862925d6ed683b4
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://maypoin.ru/strik?utm_term=2016+ford+mustang+ecoboost+engine+specs PDF link annotation
    • https://cdn.sqhk.co/zoxogatuv/fLhesgj/add_credit_card_reader_to_vending_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/jijasitov/ijChebA/47286230908.pdfIn PDF document text
    • http://legegapepapo.medianewsonline.com/tumedeji.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/8hjggto/kefotura.pdfIn PDF document text
    • http://zozegakipuvi.iblogger.org/lippincott_s_photo_atlas_of_medication_administration.pdfIn PDF document text
    • http://zujewubowufonug.scienceontheweb.net/bent_rule_and_energetics_of_hybridization.pdfIn PDF document text
    • http://bifarigudok.22web.org/his_dark_materials_series.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/EChf0jc/nizegokivugewojirivas.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/kiguteperilodu/how_to_write_an_abstract_chicago.pdfIn PDF document text
    • http://romapubimowa.onlinewebshop.net/livro_do_catecismo_da_igreja_catlica.pdfIn PDF document text
    • http://siderawe.epizy.com/what_is_the_difference_between_2008_honda_accord_lx_and_ex.pdfIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_d3ec920a9a9c4e3a9df67e0faac7277a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/43916006432.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/formal_pronouncement_crossword_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/faseloxularaxewozeseb.pdfIn PDF document text
    • https://38e81cab-313f-462b-917d-d566bf782aa4.filesusr.com/ugd/36aba1_07d43a6f7b9b42e6a5f231bbb9d56581.pdf?index=trueIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_3f5034487b034660af8fd108ad8dba96.pdf?index=trueIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_914d448e36264135be52e6476d157d92.pdf?index=trueIn PDF document text
    • http://xugemogi.epizy.com/sumerian_gods.pdfIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_0f1ca04458664b7ca07e20b8b3d79836.pdf?index=trueIn PDF document text
    • http://xafibejijopo.atwebpages.com/gimixoterezug.pdfIn PDF document text
    • http://repaxonuti.epizy.com/basic_accounting_process.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/industrialization_history_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/77943269608.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/xewawatutinivanikiza.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/40650138237.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_off0000fabf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABF 5968 bytes
SHA-256: 6e1bb16e390d44ed7409b9a7881284c0c6c0385e81fd414a2f433c497d3896e6
font_01_sfnt_off00010efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFD 11048 bytes
SHA-256: cef1b7b20823b7b86e82edd945320aa52b24f28c935abbd71caf25806e1be731

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