Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fb13fc66f5cde72…

MALICIOUS

PDF

77.0 KB Created: 2021-04-30 22:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c046f3c56d8f3c54da51b53bb76bf13 SHA-1: 2c8c22c156324d4267e3cebf0dd096670e6c0766 SHA-256: 2fb13fc66f5cde72284b66eaed7ee87ee153b86f7b9f095bfb0c694c6582eb2e
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 URL pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a pretext related to device connectivity issues, aiming to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/strik?utm_term=why+is+my+scansnap+not+connecting
    • http://kadabafomelu.66ghz.com/merekuriratavixoki.pdf
    • http://wufebowukavij.iblogger.org/78963763284.pdf
    • http://rinobozawizuvew.iblogger.org/the_old_man_and_the_sea_bangla_version.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/warapagefasovi/kenmore_microwave_wall_oven_combination.pdf
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_7f847ded16be49e293fa66a879da78aa.pdf?index=true
    • http://xabetalofel.epizy.com/allianz_arena_plan.pdf
    • http://jezodefobagepa.rf.gd/1000_books_you_must_read_before_you_die.pdf
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_75dff1d3fba341739e8a8b044c4cf13f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b9a08e19-32ef-4c30-b030-57f7bf105c42/47689587486.pdf
    • http://mevafedepuneka.rf.gd/63354098739.pdf
    • http://tazidafez.rf.gd/76170991799.pdf
    • https://s3.amazonaws.com/nonabafat/sql_commands_in_dbms.pdf
    • http://vurutif.rf.gd/como_baixar_apresentao_do_prezi_em.pdf
    • http://wapugabidojako.rf.gd/canciones_infantiles.pdf
    • http://magetamuwunaze.rf.gd/anuel_aa_songs.pdf
    • https://uploads.strikinglycdn.com/files/a420b9d0-99a2-47fc-b1c1-3b271ff121c0/2005_cadillac_cts-v_engine_specs.pdf
    • http://wufaxetotubiji.rf.gd/zafewax.pdf
    • https://s3.amazonaws.com/toguvaju/28640765269.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e4.bin
3041f5f9db9a2e16a8b5f99b78535872da0a4a0b56d11c3e999a3c0662ff986d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E4 2904 bytes
font_01_sfnt_off0000eb30.bin
fabe008f7ba5e561927ddfc7ec0e5a1ff7cab2a5269b5fede38aed66adccce66
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB30 5336 bytes
font_02_sfnt_off0000fd4e.bin
d94b4b4bec9e3f3d0f4d4357a4196f28cb35059591aac8d00791bbe9a87360a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4E 12616 bytes