Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b8977c98448d2e8…

MALICIOUS

PDF

86.1 KB Created: 2021-03-22 20:14:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f28db1165f49cfdedb64e19a9161e4b SHA-1: 7b93037b4b52b7d5803a7c8bf9b12f7f49b31a01 SHA-256: 8b8977c98448d2e8db1afb0eea9a8448a021d82af6e6a320e163b6c5f09f8d59
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, with heuristics indicating the presence of external URIs and embedded URLs. The document body, though heavily obfuscated, contains text related to leadership, suggesting a lure. The primary attack vector is likely spearphishing attachment, leading to the user visiting a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/aws?utm_term=como+es+un+lider+carismatico
    • http://verifedform.com/fifajibogojebuxizuteowb8f.pdf
    • http://logvoz.ru/how_to_charge_ps_vita_1000_without_chargerddhov.pdf
    • https://meripowubizaj.weebly.com/uploads/1/3/5/9/135959363/b5118ef.pdf
    • https://pegufozexak.weebly.com/uploads/1/3/5/3/135317465/8845758.pdf
    • https://cdn.sqhk.co/fujotojaxob/joZjf8z/33069781034.pdf
    • https://cdn.sqhk.co/solumapidema/TZ4jeTl/tap_tower_builder_3d_blocks_dwg_download.pdf
    • https://cdn.sqhk.co/xufilisakula/eje3gi4/jitizolibumex.pdf
    • http://sreda.city/korg_volca_sampler_reviewwmt3s.pdf
    • http://reabook.online/how_to_read_body_language4a5nj.pdf
    • http://pshcomonhere.xyz/loksatta_epaper_puneudtz9.pdf
    • https://juxagoneponux.weebly.com/uploads/1/3/1/3/131384300/tusewim.pdf
    • http://natorg.fun/april_2020_romance_booksn0mry.pdf
    • https://cdn.sqhk.co/lupobikud/j2nriht/assistant_dentist_in_canada.pdf
    • http://ipatovaalena.ru/zulawutefopalubowif2m1g.pdf
    • http://goldstein.capital/powered_by_the_apocalypse_superheroogwrl.pdf
    • https://susutabum.weebly.com/uploads/1/3/4/4/134464128/2816018.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d6839193-0442-4de4-8843-999e6f628820/honda_lawn_mower_repair_shops_near_me.pdf
    • https://uploads.strikinglycdn.com/files/77cb63bc-1a71-4cc2-833e-ee0f44b20f8b/21565706863.pdf
    • https://uploads.strikinglycdn.com/files/a1b4f0c2-cda6-4d4e-9ce6-0b5eac517ef2/mukubitivubuforosametuk.pdf
    • https://uploads.strikinglycdn.com/files/7acea89f-d48c-43d2-a9a1-e75a1a4e42ed/how_much_is_tm_meditation.pdf
    • https://uploads.strikinglycdn.com/files/c94f3d7e-6759-4bdb-91d2-f7daf398eb70/englander_pellet_stove_error_code_5_u.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_off00011260.bin
c8aa035bf9360968928f74e534fd9f86e4767471ebb09096c1171e756917d843
pdf-font-stream PDF embedded font (sfnt) at offset 0x11260 4992 bytes
font_01_sfnt_off00012336.bin
4c83afbdd7a375e021647aea425575f71b4350a5cf21870907cc78af999af5dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x12336 11632 bytes