Malicious PDF — malware analysis report

Static analysis result for SHA-256 4733fca8fd3ecfc4…

MALICIOUS

PDF

80.9 KB Created: 2021-03-25 13:19:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c4c04815b6db8b03b02e9e8701513b3 SHA-1: 5dee99b447b9b50a83702e5bd5aa2b36704dffa5 SHA-256: 4733fca8fd3ecfc4002d5a8ed19d64c4e79a0f0debfb3a2ce87da82df35edada
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. The embedded URLs suggest a lure related to an 'award' or 'sheet music', likely to trick users into downloading a secondary malicious PDF. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/award?keyword=beginner+classical+piano+sheet+music+pdf
    • http://usejus.pro/wefevewalirupojodowezukamkxb8p.pdf
    • https://cdn.sqhk.co/vinasujitupe/ithdYid/wesavedebinefiduwuzojon.pdf
    • https://cdn.sqhk.co/wesuwajil/aM2mgPl/folewobivagakanefov.pdf
    • https://cdn.sqhk.co/leluforeref/dgiogid/ark_survival_evolved_wiki_map.pdf
    • https://cdn.sqhk.co/mofosalamo/QJiebyk/lutojififojimanolowopelo.pdf
    • https://cdn.sqhk.co/mazonixun/ja5jiRf/wofawonawulexozamutuxa.pdf
    • https://cdn.sqhk.co/busumodofu/eUbdGHl/69111992835.pdf
    • https://static.s123-cdn-static.com/uploads/4406216/normal_5ff0e3f4cddb5.pdf
    • https://cdn.sqhk.co/wogirujut/sBjjgjc/usa_today_sports_images_recent.pdf
    • https://cdn.sqhk.co/jovuvufoxet/fU3ZhcX/space_ore_idle_clicker_apk.pdf
    • https://static.s123-cdn-static.com/uploads/4421787/normal_5fcf5af6abc9a.pdf
    • https://cdn.sqhk.co/batumozi/7jbkMja/81661070759.pdf
    • https://static.s123-cdn-static.com/uploads/4473384/normal_5fc84bf54b771.pdf
    • http://sollabs.xyz/how_old_to_work_at_walgreens_in_californiagtjte.pdf
    • https://cdn.sqhk.co/tugirujozi/vqsDian/3186160405.pdf
    • https://cdn.sqhk.co/jalegewiguw/ODggR2n/vokepokududoni.pdf
    • https://cdn.sqhk.co/devurekon/Jhck1gj/jiffy_lube_smog_coupons_las_vegas.pdf
    • https://cdn.sqhk.co/jebavimot/hagdtgh/wallpaper_hd_download_shayari_2020_sad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000faf8.bin
bb98dde2bc42c4272e7980eb7d1f604c1a90887ffc83050d21335cfb81412d1c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF8 5616 bytes
font_01_sfnt_off00010dea.bin
18177f75ba460e1c74498d330a268e1fb96d55f186c78bf830264e23cae687d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEA 12024 bytes