Malicious PDF — malware analysis report

Static analysis result for SHA-256 fecfd430bcc55171…

MALICIOUS

PDF

76.3 KB Created: 2021-04-03 07:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbcf62193efcfe0765bd4efa93d7e4dc SHA-1: 894b1496adead9892aa45efdd9aa60e42fde0802 SHA-256: fecfd430bcc55171cb98126d0328cf0329156d126073e83105d137d664ad09d2
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing lure. The document body, though heavily obfuscated, contains text related to 'cassiopaean transcripts pdf', reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://jottigo.ru/award?keyword=cassiopaean+transcripts+pdf
    • https://cdn.sqhk.co/govizanorev/dghjbzT/nba_live_mobile_basketball_hack_apk.pdf
    • https://cdn.sqhk.co/xasakeza/SigJiej/gisariwop.pdf
    • https://cdn.sqhk.co/jabisopomuxo/jeyUgjG/fantasy_premier_league_gameweek_38_transfer_tips.pdf
    • https://cdn.sqhk.co/kimejijomaki/1gcezia/44373198132.pdf
    • https://cdn.sqhk.co/sifalavuxozo/fykhggi/89254572505.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/remavuj/accounting_information_system_process_definition.pdf
    • https://s3.amazonaws.com/vovabagubajegeb/beginner_note_reading_worksheets.pdf
    • https://s3.amazonaws.com/xasovewipeje/zte_warp_elite_case.pdf
    • https://uploads.strikinglycdn.com/files/db5b63ea-dca7-4e6e-a627-19c91b311602/10041427871.pdf
    • https://s3.amazonaws.com/xoferuzu/a_suitable_boy_review_bbc.pdf
    • https://s3.amazonaws.com/zerejibixupav/24611386091.pdf
    • https://s3.amazonaws.com/kaxukok/tuget.pdf
    • https://s3.amazonaws.com/tibitexil/canon_in_d_guitar_tab_free.pdf
    • https://s3.amazonaws.com/jedobufudajewu/trace_alphabet_letters.pdf
    • https://s3.amazonaws.com/vuzotisenixava/vanisinafolawuvetusod.pdf
    • https://uploads.strikinglycdn.com/files/965aab5c-3e7a-4e28-a704-e3f9018b3ae7/how_do_you_measure_life_in_a_year.pdf
    • https://uploads.strikinglycdn.com/files/6130f727-57fb-4144-bee8-d5d62c90b017/vabobetonoletixamegapa.pdf
    • https://s3.amazonaws.com/fajeloninesitel/verudusazabo.pdf
    • https://uploads.strikinglycdn.com/files/8fc5296f-c282-401e-8e90-28e5cb57636f/formato_apa_ejemplos.pdf
    • https://s3.amazonaws.com/bolovopizonuki/rorogitesagemasitajigesa.pdf
    • https://s3.amazonaws.com/dutuzanob/kegamexomu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e74b.bin
64dca8055a597f175bd51b36ebb9fdd36e27596f3d4682765619817066a67908
pdf-font-stream PDF embedded font (sfnt) at offset 0xE74B 4928 bytes
font_01_sfnt_off0000f813.bin
993e285b263d31231aeb3c7fbc64a98b18b14cc478f9ae6fb8ffda7024920ae4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF813 10452 bytes
font_02_sfnt_off00011b75.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B75 4324 bytes