Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ee24e58c3367f1…

MALICIOUS

PDF

76.3 KB Created: 2021-04-05 08:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab4881918633eb51cc7f03429f404895 SHA-1: d540e6c3148f73c66e88d893f5f25f1ae6c74a0e SHA-256: 41ee24e58c3367f1b110447841f2ac8528f2484423c4c32c2b34e27fc92135d8
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs suggests a phishing or malware distribution attempt, likely masquerading as a 'Vivint thermostat installation manual' to deceive the user. No scripts were extracted, but the overall structure and URL findings point towards a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=vivint+thermostat+installation+manual
    • https://cdn.sqhk.co/vilubofi/jaihLsN/singing_in_the_rain_full_movie_dailymotion.pdf
    • https://static.s123-cdn-static.com/uploads/4530578/normal_5fcf333fc4e28.pdf
    • https://cdn.sqhk.co/detaludolef/i4CN6hg/35197376789.pdf
    • https://cdn.sqhk.co/kivipemo/CsqibHb/duzibadufefubonatamarukez.pdf
    • http://dobogoj.iblogger.org/what_does_it_mean_when_someone_says_whatever_tickles_your_pickle.pdf
    • https://cdn.sqhk.co/buwuvibija/gdjbifD/8345180455.pdf
    • https://cdn-cms.f-static.net/uploads/4390382/normal_605ff3ee0c5b8.pdf
    • http://dozawudefe.iblogger.org/buzexusazigasakotaragabis.pdf
    • http://busotokebos.iblogger.org/bncc_historia_ensino_fundamental.pdf
    • https://cdn.sqhk.co/sujutowupolu/ijdhhQf/beef_packers_sprint_car.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d403bd6e-3b6d-4580-8292-678e87d18a2a/jelatelubilab.pdf
    • http://geluzejezi.epizy.com/2121106243.pdf
    • https://uploads.strikinglycdn.com/files/b5e1fadd-9dcc-45fb-ab35-92b61204b77c/sir_gawain_and_the_green_knight_movie_1991.pdf
    • https://uploads.strikinglycdn.com/files/59c2d002-c9f7-45db-8b82-b64ff7eb15cc/present_simple_present_continuous_past_simple_future_tense_exercises.pdf
    • https://uploads.strikinglycdn.com/files/a9f30f46-0bd9-4ec3-acf6-a1a32b9cc135/safajodonozagovujof.pdf
    • https://uploads.strikinglycdn.com/files/05bfdfde-32ec-40fb-a6c0-f59ceda2f787/vusuvopujumazofug.pdf
    • https://uploads.strikinglycdn.com/files/3b553b3d-e9ce-4255-8f74-7049562bb3c5/ladonulomatitapisivogeva.pdf
    • http://lavebaku.rf.gd/airac_cycle_1805.pdf
    • http://vavijirodujozi.rf.gd/4508839796.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_off0000efdc.bin
6aef3cc1c78b3c1a97b797910bdbb2cda7ac6606fc9eabbd2dc557a9e55a46a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDC 4948 bytes
font_01_sfnt_off00010086.bin
2f37512caba23966335646b11d4d16316def025337705793097b1f5ab8b6f5ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x10086 10412 bytes