Malicious PDF — malware analysis report

Static analysis result for SHA-256 460a71a302b108f1…

MALICIOUS

PDF

73.6 KB Created: 2021-03-22 19:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 297594628b289645e267a7ede16314af SHA-1: 90e4da16d4af34a19ad0b178640a1cacd270d3c6 SHA-256: 460a71a302b108f115c166525f7dc389598048fe40a6a92d60070e0b73a77fad
96 Risk Score

Malware Insights

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

The file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to 'Flint hills review' and includes metadata from wkhtmltopdf, indicating it was likely generated from web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/wix?keyword=flint+hills+review
    • http://vsyahakasia.info/peripomoduxiliwerumo8wb0.pdf
    • http://fosinofabeveso.22web.org/rowazefabezokuseleta.pdf
    • http://kostlike.site/338110236022lh7i.pdf
    • https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/3814054.pdf
    • http://gnoogle.site/867670187xu693.pdf
    • https://cdn.sqhk.co/sovixojer/54hiHhi/bosele.pdf
    • http://lnstagramcopyrightmanagement.com/chasing_the_dragon_book_free133zi.pdf
    • https://cdn.sqhk.co/xenivoronizu/NpigfPN/22241343527.pdf
    • https://xomunulozesini.weebly.com/uploads/1/3/4/0/134018183/mopidunivapoge.pdf
    • http://clubstore.pro/lilesiraxonumu1qz08.pdf
    • https://cdn.sqhk.co/letarezetap/gchdjaG/lolegafofapolad.pdf
    • http://4kuhd.me/template_for_payment_plan_agreement4fuun.pdf
    • https://cdn.sqhk.co/nujudemugipi/haX5atG/banana_kong_free_download_for_pc.pdf
    • http://filanion.online/jipowobodovomekiva8q0vz.pdf
    • http://app-3null.com/kefuludilulofphekm.pdf
    • https://cdn.sqhk.co/dixejetafap/KjhJltM/lizebe.pdf
    • http://fuluwube.22web.org/78735989032.pdf
    • http://reawolt.online/call_of_duty_2_xbox_360_review6si4c.pdf
    • http://romeita.space/securities_commission_product_highlight_sheet8susm.pdf
    • https://tapukinag.weebly.com/uploads/1/3/1/6/131606864/metedukidupobuvot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jasadavebaga/kadita_build_guide.pdf
    • http://keputeka.epizy.com/vikaxutodot.pdf
    • https://s3.amazonaws.com/zabevog/ffxiv_shadowbringers_endgame_gear_guide.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_off0000e022.bin
8225f4b2dcd341308a2b6f12cadacba7ce6d473298aae7817e707ecee9675ee2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE022 4672 bytes
font_01_sfnt_off0000f014.bin
68c45fc41e73dbd4702d3583fbfae09de3ca0584dc3a036206590ca5784f6bb6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF014 11724 bytes