Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4e7c26c1c49d52…

MALICIOUS

PDF

99.6 KB Created: 2021-03-16 18:55:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38816de7023fe5d39f8f3492791b9923 SHA-1: 7898766692f8037b4b6b5dbcfed5a5e05df69e60 SHA-256: da4e7c26c1c49d520051eb84cac5f8615b20368abe96e0b461946fb50dc9675d
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the link farm point towards an effort to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 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://soxebez.ru/wix?keyword=gray+and+osborne+clothes
    • http://wegoluxetas.scienceontheweb.net/matlab_plot_line_weight.pdf
    • http://edayafar.xyz/zixomiojxk.pdf
    • https://static.s123-cdn-static.com/uploads/4379482/normal_5fc9331c9a851.pdf
    • http://uabiomanix.xyz/zona_de_desarrollo_proximo_y_andamiajep9jhw.pdf
    • http://geparup.scienceontheweb.net/craftsman_42_mower_deck_parts_diagram.pdf
    • http://kavuxolabazili.iblogger.org/why_wont_my_vivofit_3_sync.pdf
    • http://2020coupons.info/kivuwimaxufelug8p83.pdf
    • https://cdn.sqhk.co/fumamimed/eiGianb/bypass_password_lock_on_iphone.pdf
    • http://nufivuzelikonax.getenjoyment.net/dikolavesanawidenekijog.pdf
    • https://cdn-cms.f-static.net/uploads/4456705/normal_602c7ebb84061.pdf
    • http://vnds-v.website/cs_lewis_screwtape_letters_playmf8e7.pdf
    • https://cdn.sqhk.co/wogokodu/dhdylje/guess_men_shirts.pdf
    • https://cdn.sqhk.co/vinusubat/aihyegi/15853999661.pdf
    • http://duxogesubuz.22web.org/solving_equation_with_fractions_worksheet.pdf
    • https://cdn.sqhk.co/pelopuxi/jgfhbng/motorola_razr_2019_sim_card.pdf
    • https://cdn.sqhk.co/motanunika/0oDiiCm/golixagopogajak.pdf
    • http://kamini33.ru/tawizo876va.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://repajazofuwide.epizy.com/pandora_plus_apk_ios.pdf
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_a218f61e88d845739058425fe1852cb1.pdf?index=true
    • https://5e9816b5-e261-4a84-a5c7-594b6999e1c8.filesusr.com/ugd/eb2f7d_1e942d179252410f8d3969431ab6aff4.pdf?index=true
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_5c408c5268fe42aba7e9195efe2f9131.pdf?index=true
    • http://rujemivegelap.epizy.com/what_is_the_best_app_to_learn_korean_language.pdf
    • https://550dfcec-0280-4316-a0d5-68b74a7a20b9.filesusr.com/ugd/f59309_4372afa4018e489ab3c325071ca93900.pdf?index=true
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_45818e9cac1d4db38e8d2d5e15256846.pdf?index=true
    • http://tozopovudot.epizy.com/30737756027.pdf
    • http://pevipitoz.atwebpages.com/gallagher_representative_government_in_modern_europe.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_off00014bac.bin
22a1e60be20f695f56ddaf4eeecf27626b1d34ba9c863019599214ae3ed7180a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BAC 5300 bytes
font_01_sfnt_off00015dac.bin
f882df35d7da6c55fefefa48b5e282eebc4c4b39040f8da45ea2422aeaa3ab2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15DAC 10120 bytes

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