Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a94d224da4e274…

MALICIOUS

PDF

76.5 KB Created: 2021-02-28 05:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 726b6d5a11b504ba4237138357c68c10 SHA-1: d0694062a37d23fb518267b8156b10d6a5625425 SHA-256: 67a94d224da4e274727afe0c46539ee38adda30ada712de15657c9fd8a424d76
136 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL designed to redirect users to an external site, identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's part of a phishing campaign, likely attempting to trick users into downloading further malware or submitting credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://vilenefex.ru/aws?utm_term=oreck+xl+air+purifier+cleaner PDF link annotation
    • http://poxedon.22web.org/the_help_kathryn_stockett_based_on_true_story.pdfIn PDF document text
    • http://onesmall.space/90043273769ks33t.pdfIn PDF document text
    • http://mnatural.space/78251910666lul3.pdfIn PDF document text
    • http://brightshopbg.xyz/intoxicacion_por_barbituricos_pediatriar289v.pdfIn PDF document text
    • http://yandex-delivery.cc/71302093635fdx4w.pdfIn PDF document text
    • http://studytogether.fun/the_walmart_effect_by_charles_fishman47yff.pdfIn PDF document text
    • http://skidki-day.store/chamberlain_wd962kev_battery68s9a.pdfIn PDF document text
    • http://scandisvet.ru/12611023370yos14.pdfIn PDF document text
    • http://zenafek.iblogger.org/what_lies_beneath_hd_movie.pdfIn PDF document text
    • http://pogadai.xyz/rome_total_war_barbarian_invasion_cheats_units_listrjbwn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/45678795238.pdfIn PDF document text
    • http://dujazenemelix.epizy.com/appointment_letter_format_for_design_engineer.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/lolebapuzat.pdfIn PDF document text
    • http://xifofemixogo.rf.gd/up_deled_form_date.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/tektronix_tds3054c_oscilloscope_manual.pdfIn PDF document text
    • http://nigowona.rf.gd/61945535483.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/josonazujarewujotefaj.pdfIn PDF document text
    • http://nimozan.epizy.com/tefarixifejoninizor.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/aur_pyaar_ho_gaya_movie.pdfIn PDF document text
    • http://damikofem.rf.gd/nefipa.pdfIn PDF document text
    • http://jopinewo.epizy.com/13740654090.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/kindle_epub_books.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/camera_lenses_explained_for_dummies.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6C 4992 bytes
SHA-256: a30bfbf143bfeeda9b67100cb7380a8d407ad91ffce8a2207ab818ffb41d8f82
font_01_sfnt_off00010082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10082 10648 bytes
SHA-256: 701d5e20b6feebddb3f79e9bee8af4fb461e0e13e68695335b4b5e0906e89d82

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