Malicious PDF — malware analysis report

Static analysis result for SHA-256 754c8739e374ab18…

MALICIOUS

PDF

96.9 KB Created: 2021-03-22 01:41:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4afabd0fd701e6330e0234aa3f2c3912 SHA-1: 4a03ad6550adb27ecbb0e521fd2a63b83c517335 SHA-256: 754c8739e374ab18b56eb209f32f25da2954bf76431f9ae49041e14fc34e3b9c
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a phishing page or download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a 'defense platform'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing or malware distribution attempt.

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://pelibifir.ru/123?utm_term=defense+platform+stellaris+2.+2
    • http://xujimutisep.iblogger.org/how_to_write_a_thesis_statement_middle_school_ppt.pdf
    • http://tebifujokejub.22web.org/mowudon.pdf
    • https://cdn.sqhk.co/pemenodisoda/icjihec/tapezovubovurokem.pdf
    • http://bolawixefop.mygamesonline.org/martial_art_tutorial.pdf
    • https://cdn.sqhk.co/midipijikami/shgjh3C/femopefuzigidulek.pdf
    • http://xakubogika.22web.org/66843639532.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e85d8dbc-23da-4ed2-8413-c3929c077874/20311580474.pdf
    • http://gijabakupukuj.rf.gd/deadly_betrayal_movie_free.pdf
    • https://s3.amazonaws.com/rabewiruzitewa/proliferative_diabetic_retinopathy_treatment_guidelines.pdf
    • http://texukevopafol.epizy.com/89672385032.pdf
    • https://uploads.strikinglycdn.com/files/38f582e4-c2e2-493a-b187-77f86197aa44/1462646705.pdf
    • https://uploads.strikinglycdn.com/files/dbd3f5bb-02ac-43d3-b51a-6d3ad5cd7893/breville_juice_fountain_cold_press_review.pdf
    • https://s3.amazonaws.com/jafujasiwetid/pemdas_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/9a74b4c6-53bd-47b5-9efc-1655c481ea9b/agatha_christie_poirot_season_12.pdf
    • https://s3.amazonaws.com/firudegix/trust_deed_template_south_africa.pdf
    • http://nabenejajoko.myartsonline.com/97371127048.pdf
    • https://uploads.strikinglycdn.com/files/9abe79d7-3c86-4266-b04d-7cac043e8213/calligraphy_exercise_sheets.pdf
    • https://uploads.strikinglycdn.com/files/5b88979c-2f31-48fb-bdc1-dccfbe96cf9d/86766833442.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_off000140a7.bin
7743cbb2e6d73356d1948f673dbd6b5c0cb19124cdef9c89040887ac08986920
pdf-font-stream PDF embedded font (sfnt) at offset 0x140A7 5208 bytes
font_01_sfnt_off00015255.bin
70b54579f9ae65154d297dd5ae390638cc5c6650bc337cb47689a2d6eb91f5b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x15255 10680 bytes