Malicious PDF — malware analysis report

Static analysis result for SHA-256 958d6a5914cb5450…

MALICIOUS

PDF

76.3 KB Created: 2021-03-14 04:13:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94eaa96864bb854fc4c124f9dd6f8554 SHA-1: 53a8dd85d6e8dd57e9b585052fff8a7d778498a7 SHA-256: 958d6a5914cb5450949d17db0c01691f03e1827f5aad698493e011adeb18e5ac
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including ML and ClamAV, as malicious. The document body, though partially corrupted, suggests a lure related to 'Tratamiento nutricional para cancer de colon pdf', directing users to a suspicious domain. The presence of PDF_URI and EMBEDDED_URL heuristics indicates attempts to redirect users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8256

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://mezovuduw.ru/award?keyword=tratamiento+nutricional+para+cancer+de+colon+pdf
    • http://peromopativej.mypressonline.com/1_what_are_the_features_of_academic_writing.pdf
    • http://gujozulogisin.scienceontheweb.net/periodic_table_elements_printable.pdf
    • http://delayikapy.xyz/attack_on_titan_final_battle_game_nintendo_switchc4n1e.pdf
    • https://static.s123-cdn-static.com/uploads/4379618/normal_5fcaf38510dbe.pdf
    • http://momivelugi.iblogger.org/99350999896.pdf
    • http://straponartist.com/guwubonizosukowozikan2dqrk.pdf
    • http://storedubai.shop/how_to_measure_home_energy_efficiencyuu2x9.pdf
    • http://sale20.site/kixoki3qion.pdf
    • http://reduslim-italy.site/balancing_chemical_equations_worksheet_answer_key8wskf.pdf
    • http://copyrightsupportforlnstagram.com/how_long_to_heal_after_dental_traumanzkka.pdf
    • http://mufajaku.medianewsonline.com/57688468164.pdf
    • https://cdn-cms.f-static.net/uploads/4365570/normal_60411d90cfe57.pdf
    • http://nesobaka3.xyz/pemazogufosovugabadisif44i2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://litutowi.epizy.com/32532283254.pdf
    • http://wenares.myartsonline.com/shimano_dura_ace_di2_manual_dansk.pdf
    • https://s3.amazonaws.com/dalava/80620461207.pdf
    • http://xepalufozakot.epizy.com/absolutism_and_relativism.pdf
    • https://s3.amazonaws.com/tobobowu/potibajovemajaludawu.pdf
    • https://s3.amazonaws.com/satuja/ford_focus_rs_2003_for_sale.pdf
    • http://menenig.rf.gd/algebra_symbols_and_terms_crossword_puzzle_answers.pdf
    • https://s3.amazonaws.com/rimepusox/19212800999.pdf
    • http://zasemamol.rf.gd/57236039223.pdf
    • https://s3.amazonaws.com/nisoxow/44208734395.pdf
    • http://sipanokule.onlinewebshop.net/petsafe_in_ground_fence_setup.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edd6.bin
d7693ec2cbb4bf250374d35ffacd1832c3d85c4cfbb3d7d724e068cbc3ca1e27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD6 4952 bytes
font_01_sfnt_off0000fe8d.bin
d24702c06e594535cb234a13c8e9ce6563f70ae8cee4d79aed350395102af314		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8D 10076 bytes
font_02_sfnt_off000120e0.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120E0 4324 bytes

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