Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f96fac40cad8b4a…

MALICIOUS

PDF

89.3 KB Created: 2021-03-14 17:05:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4ba92b612df9c0a7127b029d721d945 SHA-1: bf87cfae33fd0d2253689142e9f18570adde65cb SHA-256: 0f96fac40cad8b4ad172e67aa05bab090714b7ca5c898cb58da839c90c836157
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 high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be related to a worksheet, suggesting a lure to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/wix?keyword=solving+systems+by+substitution+worksheet+answer+key
    • http://ridunculus.com/james_stewart_calculus_6th_edition_solutions8kf5r.pdf
    • https://cdn.sqhk.co/nazujovo/dg5icgh/43698760103.pdf
    • http://testertumentum.space/2015_dodge_challenger_user_manualxdqdb.pdf
    • http://islemleriniz.org/lenovo_ideapad_duet_chromebook_za6f_128gbj3h8e.pdf
    • https://cdn-cms.f-static.net/uploads/4496380/normal_602b789536060.pdf
    • https://static.s123-cdn-static.com/uploads/4384325/normal_5fe53e5b7f9a8.pdf
    • http://ketotreno.buzz/30611242485y72pi.pdf
    • http://fruit-ita.fun/canon_lide_120_scanner_user_manualolxar.pdf
    • http://sandiego-podcasts.com/afterlight_mod_apk_latest9nyj4.pdf
    • http://nasty666.space/what_does_the_bible_say_about_false_hairg8fh5.pdf
    • https://cdn-cms.f-static.net/uploads/4467581/normal_604c970d66c96.pdf
    • http://lnstagram-help-businesss.com/college_comparison_spreadsheetkxom5.pdf
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5fd97db8e43be.pdf
    • http://garant-ritual.online/monopoly_gamer_mario_kart_instruccionestevi4.pdf
    • http://voicebftyi.com/judivakaweroketukejammkiy.pdf
    • http://bonboxstudio.com/kuwidepofirerugslqvl.pdf
    • https://cdn-cms.f-static.net/uploads/4366009/normal_601a88010e35c.pdf
    • http://waystep.site/fitivalunamalizuvedanuevvnv.pdf
    • http://instasurprise.online/91006214174ab200.pdf
    • https://cdn.sqhk.co/fasisela/ghijhG9/tawulike.pdf
    • http://honey-love.ru/95349206556nk1tn.pdf
    • https://cdn.sqhk.co/tatomaxeriri/XJJFgff/xcom_enemy_within_android_controller_support.pdf
    • http://50offstore.info/iomega_home_media_network_hard_drive_windows_10yvy0g.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_off00011925.bin
514d400085459993395ac35157cd22196d4a0bb57992bc4c0a864b3bc8a52c18
pdf-font-stream PDF embedded font (sfnt) at offset 0x11925 5660 bytes
font_01_sfnt_off00012c55.bin
bda342899f682efca1b02998538d1f63062be0f70632a571e10058bebc1a60c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C55 12500 bytes