Malicious PDF — malware analysis report

Static analysis result for SHA-256 441aadd6fac368c5…

MALICIOUS

PDF

85.7 KB Created: 2021-03-25 17:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6430a55ccf5f99e30f011e66ee79b2c6 SHA-1: 4ec38214d54ed236e51c2a9dd9e04e36b68c44e8 SHA-256: 441aadd6fac368c588258abb0a4249b0744a911f0174d388269783af2081f597
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=automatic+transmission+service+group+free PDF link annotation
    • https://cdn.sqhk.co/tedisebufen/wshcigj/pick_up_lines_for_tinder.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/8fhaphe/grow_cube_game.pdfIn PDF document text
    • https://cdn.sqhk.co/mivadunoxo/iB67FdJ/vonivelen.pdfIn PDF document text
    • https://cdn.sqhk.co/bunorebegoji/ebHidij/group_d_answer_key_2018_17_september.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvivazonewa/diiFuhi/tuzukis.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/how_long_can_baby_be_in_graco_swing.pdfIn PDF document text
    • http://wujasonuvilo.mywebcommunity.org/best_funny_jokes_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/vedoreket/ifTVE9o/ginudikusalas.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/wiihcig/31335822227.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/hD0hgHQ/spacex_tunnel_video.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/Fijivic/23119538552.pdfIn PDF document text
    • http://poguferuliwu.iblogger.org/can_i_put_bath_salts_in_my_humidifier.pdfIn PDF document text
    • https://cdn.sqhk.co/naxudufejik/fijxmjg/paditokalonuxujajenox.pdfIn PDF document text
    • http://xujaxul.mywebcommunity.org/calendar_2020_template.pdfIn PDF document text
    • http://puveputado.sportsontheweb.net/distributive_property_of_multiplication_worksheets_3rd_grade.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nizofikunatafu.atwebpages.com/aleks_math_practice_test.pdfIn PDF document text
    • http://napubuxuwel.epizy.com/43120114490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa16e0d-d991-47ad-9503-df0d93461284/chapter_2_the_chemistry_of_life_vocabulary_review_answer_key.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/7504907594.pdfIn PDF document text
    • http://gezixus.myartsonline.com/44965038933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f8bca22-519f-4f77-945d-9fb9f5bf58ad/how_do_i_get_the_radio_code_for_my_2005_honda_civic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3456d4eb-d5cd-42ca-8c9d-15fa1cd01d09/82973024001.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/white_tiger_2012_movie_review.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BF 5236 bytes
SHA-256: 7f3da3d9584129ad55adf17c29a58934e02c7ae7f1fc5c8c522030f526939f82
font_01_sfnt_off00011582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11582 10344 bytes
SHA-256: 730527a6095a9119eeeda65fdb55e77d57345973883dc52725c78c88245f0d58
font_02_sfnt_off0001390e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1390E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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