Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db0737b96f9774c…

MALICIOUS

PDF

74.9 KB Created: 2021-04-25 17:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71407b7dd38b7eba6a9c15a8b3360368 SHA-1: 9b7cf53fa1386580cd2c1fc33b0a1652f0d47a58 SHA-256: 6db0737b96f9774c3ec56855dc4f2e8813f5d789f0634f56b45090eb8c2b6b4c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the nature of the detection suggest it's designed to exploit user interaction, possibly through embedded JavaScript, to redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=my+honeywell+wireless+thermostat+is+not+working
    • https://cdn-cms.f-static.net/uploads/4486984/normal_60198b7ba5a8b.pdf
    • http://nitiwomifigurod.mygamesonline.org/penguin_readers_level_4.pdf
    • https://cdn-cms.f-static.net/uploads/4377098/normal_6010ca05145f4.pdf
    • https://static.s123-cdn-static.com/uploads/4384149/normal_5fe5607527dc3.pdf
    • https://cdn-cms.f-static.net/uploads/4424025/normal_6028e66e4cf31.pdf
    • http://lngcliente.com/user_story_mapping_booktwo59.pdf
    • http://batmbatm.ru/matlab_arduino_programming7n786.pdf
    • http://armlur.space/4956462014233uc5.pdf
    • http://easycreditscore.info/51677578987finku.pdf
    • http://sosed.market/xofiwerubelukolifitn1j.pdf
    • http://jurojegame.getenjoyment.net/download_ceros_dan_batozar_tere_liye.pdf
    • http://maxist.ru/jajevinebuluzb9fq2.pdf
    • https://cdn-cms.f-static.net/uploads/4472788/normal_605c1611252d0.pdf
    • http://thailandlove.site/70201949933xmatn.pdf
    • https://cdn-cms.f-static.net/uploads/4394079/normal_605d4cb52202b.pdf
    • https://cdn-cms.f-static.net/uploads/4381735/normal_6011287c5c9c5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wovugi/15267575850.pdf
    • https://s3.amazonaws.com/tuzamada/ethiopian_reporter_vacancy_2019.pdf
    • http://pikubub.onlinewebshop.net/how_to_cook_rice_in_the_electric_pressure_cooker.pdf
    • https://s3.amazonaws.com/pulujolatepuv/jegunavu.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_off0000e8f7.bin
a4cc2cca89bd3decd44235c05c174cc08239989ddd520aed26b097cb1a47f09c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F7 5364 bytes
font_01_sfnt_off0000fb2a.bin
45ebcc98772cf7e1ff47cf6329be293d418fc19de8065c49b27d10eab3091d6b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2A 10264 bytes