Malicious PDF — malware analysis report

Static analysis result for SHA-256 99a358d0579cacb1…

MALICIOUS

PDF

81.5 KB Created: 2021-03-14 08:50:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 984e0658a2b6d4c2c44ab4bf75c81142 SHA-1: 43432606a2bf11f98447aba713e70fe1e421ce92 SHA-256: 99a358d0579cacb10fc3f5682faf26f20ad1d7bcae3e7aef68e62a69ec2401f3
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple external URIs, including one that appears to be a search result lure, suggests the document is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=mega+man+x+boss+intro
    • http://xuzugukow.iblogger.org/pdf_file_converter_software.pdf
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/vigese.pdf
    • https://xapawijumoj.weebly.com/uploads/1/3/1/3/131379373/migopi_pukewifoxij_xixipowal_figusawo.pdf
    • http://frankiearvelo.com/97512113448xcd5.pdf
    • http://bivoliku.mywebcommunity.org/molecular_mechanism_of_synaptic_transmission.pdf
    • http://vumonivaxozutod.mypressonline.com/47577293543.pdf
    • http://sdfsdfsdf.shaketorch.com/mezelurapobefotuga.pdf
    • http://vumamanepu.sportsontheweb.net/how_to_write_a_book_summary_examples.pdf
    • http://reduslimitaly-ufficiale.site/fadorikotixukkq7g7.pdf
    • http://womivakated.iblogger.org/fukigorumosexijifu.pdf
    • http://vomidujoma.scienceontheweb.net/wijegaselam.pdf
    • http://help-verification.com/gowikafeni07ur9.pdf
    • http://lasabobobatir.22web.org/why_is_my_hoover_washing_machine_not_draining_properly.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dolasuwukino.epizy.com/how_to_reset_pioneer_avic_5000nex.pdf
    • http://wadoromutisagar.myartsonline.com/cabinet_secretaries_in_kenya_2020.pdf
    • http://rerodijunenema.epizy.com/82118604709.pdf
    • http://megisaduvivegi.epizy.com/second_book_in_the_uglies_series.pdf
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_09895cf72d654d97b31b370c4aa2ef0c.pdf?index=true
    • http://poxabeb.rf.gd/what_is_the_strength_of_a_good_teacher.pdf
    • https://be8f41f0-9ddd-434d-ab6d-aa755a40b80d.filesusr.com/ugd/726d9c_64bcbbe4129c4f0fb954aa86d26443ae.pdf?index=true
    • http://dujizadixupodur.epizy.com/mbti_personality_type_test.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f096.bin
2ba6e0c4516ae528974428ab90d2fcb845e31fc6427c3681d976df34e50bf0fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 6568 bytes
font_01_sfnt_off000100e3.bin
727798d8a92a27469ab269b7d0d0cb231a729efe9a1cd3d461509c288ed7583d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100E3 5184 bytes
font_02_sfnt_off00011284.bin
ed40a197fb9021d4b57f16544328a510357c11bdbdf39b5b653e90e7ca2a0bfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11284 11252 bytes

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