Malicious PDF — malware analysis report

Static analysis result for SHA-256 db82b30fec805652…

MALICIOUS

PDF

74.9 KB Created: 2021-02-15 22:56:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 791051bdcf693034ed4ad6f30852384c SHA-1: 660b5015e7ad049476675342f632cc1e493f9577 SHA-256: db82b30fec805652869b0df452aa35510a3c1abcb6b9ccb3474631aae345a5fe
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains keywords related to a repair manual, suggesting a social engineering lure.

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://baarspo.ru/wix?keyword=briggs+stratton+repair+manual+download PDF link annotation
    • http://gulexamotapa.iblogger.org/winiwewabefirew.pdfIn PDF document text
    • http://wigigokewadusad.iblogger.org/66915411861.pdfIn PDF document text
    • http://tebivumiwutuf.iblogger.org/idiot_test_2_answers.pdfIn PDF document text
    • http://pedosapabosa.iblogger.org/bibepidukitoxomodexifaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413982/normal_600a5d349b702.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xoxerulegud.epizy.com/raees_full_movie_filmywap_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/jisaterakevavigu.pdfIn PDF document text
    • http://xelidamos.epizy.com/disorders_of_respiratory_system.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/jotanomavakusigam.pdfIn PDF document text
    • http://tuxefofoxomar.epizy.com/poison_dart_frog_care_guide.pdfIn PDF document text
    • http://junimufik.epizy.com/calculating_discounts_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/introductory_chemistry_6th_edition_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/timesheet_conversion_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/perezivivubipijusadet.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB1 5304 bytes
SHA-256: e4d3d57e0776871d784d1aedf486a07177900abf057da3950602582f919f55cd
font_01_sfnt_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 10132 bytes
SHA-256: 35f0171b34f22cd77693502c0cd1b31dc55b34c0aa3b9119121e68d82b86925a
font_02_sfnt_off00011060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11060 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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