Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef4d0c28d6c1610a…

MALICIOUS

PDF

80.3 KB Created: 2021-03-18 18:56:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: efc0dd0f5919d4ce0a484c9cad38aef0 SHA-1: 3d048ad3e288082fc26cd9d1eb5682f1c8097f3a SHA-256: ef4d0c28d6c1610a6787bd37e16b824ae452fb6287a4e7a0c5fcf1866760dc9b
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it functions as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/award?keyword=islamic+banking+in+egypt+pdf PDF link annotation
    • http://zaxiluxedexu.getenjoyment.net/java_manual_free_download.pdfIn PDF document text
    • http://tetutunugu.iblogger.org/bootstrap_contact_form_html_css.pdfIn PDF document text
    • https://cdn.sqhk.co/dilobowuz/ibWuTy2/bike_ride_games_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446633/normal_60237298d2dfc.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/hbS9qdm/47073471928.pdfIn PDF document text
    • http://gufosizikok.22web.org/pepupoputoxuwedoxidefe.pdfIn PDF document text
    • http://menetufebev.22web.org/t_d_s_full_form.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/jchjjUa/house_music_radio_stations_nj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424996/normal_6038759b5c9b6.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/s9ihjcA/norse_gods_and_greek_gods_comparison.pdfIn PDF document text
    • http://ponaxamewimenul.sportsontheweb.net/30742276371.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kutubuge.rf.gd/wunixun.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/97160754473.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/ratunazomuzizidafupurus.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/29962451.pdfIn PDF document text
    • http://nizofikunatafu.atwebpages.com/monster_2003_movie_123.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/android_vs_iphone_11_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/xonubafav.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/stop_caretaking_the_borderline_or_narcissist_ebook.pdfIn PDF document text
    • http://kipejefanowisu.atwebpages.com/trigonometric_identities_for_class_10.pdfIn PDF document text
    • http://zupibejozoge.rf.gd/vodejesutusuvugiw.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/black_water_movie_480p.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1A 5300 bytes
SHA-256: c67b5a92be4702d1c45d20786fe4226df10a879e25ef3d36801891c633d59407
font_01_sfnt_off0000fd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0A 11404 bytes
SHA-256: 9cbe1c92f6584964c76aa8a6331df064035adff01ed255c5313f5369df02851c
font_02_sfnt_off000123e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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