Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45d4994368c42fe…

MALICIOUS

PDF

156.5 KB Created: 2021-04-02 21:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4be914148c9757d47138b3f3cf26d8ac SHA-1: de21231eb8e1af7af6ab0abd031d45b3a7275159 SHA-256: b45d4994368c42feb19d40aa96f204c2577ec912d67a34bfbf7a58ee27b3aa91
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user. The document body, though heavily obfuscated, includes text related to 'Ptolemaic alexandria pdf' and the wkhtmltopdf tool, suggesting a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://midufefew.ru/123?utm_term=ptolemaic+alexandria+pdf PDF link annotation
    • https://cdn.sqhk.co/roratumopiv/jhihrja/vamuje.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/ePuXhda/92490336765.pdfIn PDF document text
    • http://musofiron.ru/canon_rs_60e3_manual48mus.pdfIn PDF document text
    • http://eurofamily.pro/personal_biography_template_freessvjd.pdfIn PDF document text
    • https://cdn.sqhk.co/sapasimemo/fXijeih/livopekurogot.pdfIn PDF document text
    • http://alkim.xyz/pixumucbcn5.pdfIn PDF document text
    • http://tubezadobuzaro.66ghz.com/hospital_feasibility_report.pdfIn PDF document text
    • https://cdn.sqhk.co/nedevupoj/jIavTSp/76898858226.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8133722f-2bc5-4a65-b6f0-5d68eae8ead4/how_to_replace_bose_remote_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db5c14a9-4055-4a40-b4fe-69f4a2907827/whos_afraid_of_virginia_woolf_american_dream_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/how_to_learn_theory_easily.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d64ec3-7854-466b-a598-d81171e69f58/mens_fashion_jumpsuit_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/sefuredodapus.pdfIn PDF document text
    • http://zebivavube.epizy.com/celebrate_recovery_lesson_7_sponsor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc48f81-d2c0-483f-897d-001ff1c76fa4/61261251476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb085a39-6aff-47c2-8657-3576a534c184/63774121977.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/mark_tushnet_advanced_introduction_to_comparative_constitutional_law.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/viwuj.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/landforms_worksheets_2nd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/what_are_the_five_basic_needs_of_all_human_beings.pdfIn PDF document text
    • http://kebanibaru.epizy.com/babul_meriyan_gudiyan_punjabi_song.pdfIn PDF document text
    • http://dukodisedibuji.epizy.com/green_building_design_principles.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/android_version_phone_upgrade.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/73361437730.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/ikea_malm_chest_of_3_drawers_oak_veneer.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D17A 7852 bytes
SHA-256: 1f12c97d2136c5e0d499b384c986dd82bba6d2eacedd684cfd2fe3bac04e0938
font_01_sfnt_off0001e604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E604 4292 bytes
SHA-256: 379efc35c8c0cd28ec9e20e2e4037e101fd799e3015cba1defb3aac5e3f0a969
font_02_sfnt_off0001f53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F53D 5192 bytes
SHA-256: 22df89fa21c47238815a1322214c69985f814a73daacf7c4a9d71e802fa12b91
font_03_sfnt_off000206d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x206D4 20480 bytes
SHA-256: b474e4b527fb7eb199b511fd89313e37fa41a01f2b26466003724b45745bb81c
font_04_sfnt_off00024203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24203 19832 bytes
SHA-256: 2408628b4a30f24baafdf897360e05b073b05e91e74be1f87549178b37e585d0