Malicious PDF — malware analysis report

Static analysis result for SHA-256 33612044918b2725…

MALICIOUS

PDF

90.6 KB Created: 2021-04-05 04:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02f915fa2120455ca2c1abd8c6618765 SHA-1: d17d6c55a0ebfd1d3529117708d35b241c5ce609 SHA-256: 33612044918b2725eb72f3fe84134e753a86adaadb9fe9fe419f6dd3f6c998f6
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'nipisod.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'anxiety attack help guide' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/123?utm_term=anxiety+attack+help+guide
    • http://storeplus.info/37098642523v1kmd.pdf
    • http://pavawafupef.66ghz.com/mevinunenonugevo.pdf
    • https://cdn-cms.f-static.net/uploads/4463554/normal_60160fa28f7ef.pdf
    • https://cdn-cms.f-static.net/uploads/4386848/normal_6057b20861c66.pdf
    • http://lnstagramverifiedsbadgeforms.com/gerunds_exercises_with_answersw22zb.pdf
    • https://cdn-cms.f-static.net/uploads/4463792/normal_5fdbb87d7dfae.pdf
    • http://pristav.pro/rcbs_chargemaster_1500_reviewsm4ug.pdf
    • https://static.s123-cdn-static.com/uploads/4424985/normal_5fc69c1a9e891.pdf
    • http://onlinetyz.xyz/how_to_set_up_your_fishing_pole_for_troutpc5fp.pdf
    • http://kojovud.iblogger.org/93740952602.pdf
    • http://busibear.com/ciencia_de_los_toltecasm5wbq.pdf
    • https://static.s123-cdn-static.com/uploads/4415543/normal_5fccb56f75267.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://texazufuvo.rf.gd/dubojigudojazalesarejov.pdf
    • https://52b03d57-94e3-497b-b2ee-5a576b8f136c.filesusr.com/ugd/67ae49_2cc13cf08b1b451db9d8ae595d04042c.pdf?index=true
    • http://solilajikabode.rf.gd/how_to_start_reading_spider_man.pdf
    • https://s3.amazonaws.com/zonebon/60564701564.pdf
    • http://padekapekalerel.rf.gd/zinc_die_casting_process.pdf
    • https://f85e9a30-dbb9-40fd-a66d-53bd7daafe07.filesusr.com/ugd/1b9faa_ba57128ed6a64d33b2fda56884954385.pdf?index=true
    • http://munuvuzuwewojef.epizy.com/17192404709.pdf
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_53c1eabe772646e9a0a4329a91e3ffb2.pdf?index=true
    • https://e3e1c2aa-7f41-47b0-8c2f-d823cb48b857.filesusr.com/ugd/7598fa_b1b6f47903d24584ad60b52c5540b9a7.pdf?index=true
    • https://s3.amazonaws.com/limewub/putimaxilefafinanavirexod.pdf
    • https://s3.amazonaws.com/xasovewipeje/34814810766.pdf
    • https://s3.amazonaws.com/wuvepilamamuse/what_kind_of_salt_do_you_use_in_a_kenmore_water_softener.pdf
    • https://34ea5197-a9e9-4ba5-99bb-a7dd7aeba98b.filesusr.com/ugd/234f58_45371389dcdc4f8fb70f80f4c77871ea.pdf?index=true
    • http://bibalaluroxute.epizy.com/deep_pocket_fitted_sheets_canada.pdf
    • http://gikosetopetidun.rf.gd/sifalewegesitutemazufaxik.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_off0001249f.bin
71727cda927b294fe584b92fa8e07ae062180150ea04ba1014035b2ff89c956e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1249F 5284 bytes
font_01_sfnt_off000136ab.bin
acd60c1fc3e4ce90a9beaa5463595b419407bfec503c669b6e787a7e4d09e90b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136AB 11196 bytes

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