Malicious PDF — malware analysis report

Static analysis result for SHA-256 acea51c832c9bcb2…

MALICIOUS

PDF

73.2 KB Created: 2021-02-12 15:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7cea2099ad33375a510e5ff9b24f1e59 SHA-1: c25be7fc3be6492133e9a31b67033e3f83f52993 SHA-256: acea51c832c9bcb236b2512cc25205ca78bf2580b2ede76d4816f79349c121eb
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wb?keyword=american%20music%20awards%202018%20best%20performers PDF link annotation
    • https://lejawoxaniw.weebly.com/uploads/1/3/0/7/130738778/eaa516f8552.pdfIn PDF document text
    • http://erogan-oficial.site/life_simulator_3_vlogger_or_investory269b.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/jakujakula/51320323152.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/fatowiriviniboxikejabafux.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/38593386217.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/valence_electrons_and_the_periodic_table_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/manenededite.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/64719914999.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/cover_sheet_for_fax_message.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/kemenikalimelegupal.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/bhanga_hrudaya_odia_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/99856523452.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/zutenisabevizarapupakowib.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/luragogekuw.pdfIn PDF document text
    • http://dupetomumipur.rf.gd/faulkner_county_sheriff_reports.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_off0000dd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD39 6012 bytes
SHA-256: 725d68326f8eb52dec3ac1fcc7f95f6f018d21d72144d8b36f9da6f4aefb0217
font_01_sfnt_off0000f1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A4 11748 bytes
SHA-256: d5cb695e4d6a7ba19aaf1dd7d9b4151826c2d1127586e481b5df9808dde46c24