Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc176c8be486492d…

MALICIOUS

PDF

75.5 KB Created: 2021-01-27 23:27:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 745b8371af8a5f9150cf8bf561bbe068 SHA-1: c5524c8a1d849c29bf51518fb013b4d9e990a753 SHA-256: dc176c8be486492df9409600b4129aad00f0b5b4cb2b9970e26f0798f55b6570
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/aws?utm_term=sublease+contract+template+word PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459785/normal_600eb2f2ed8fe.pdfIn PDF document text
    • https://kazilapematif.weebly.com/uploads/1/3/5/2/135293457/2e9e2091011b7ed.pdfIn PDF document text
    • https://pewatusikowago.weebly.com/uploads/1/3/2/6/132683224/nanujale.pdfIn PDF document text
    • https://zoredufuno.weebly.com/uploads/1/3/4/6/134638801/4bba59e74b8.pdfIn PDF document text
    • https://xapenivivafozeb.weebly.com/uploads/1/3/1/3/131379266/3957243.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://butopam.rf.gd/annayya_video_songs_mp4.pdfIn PDF document text
    • http://sosodif.rf.gd/savoraju.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/rebugewapagub.pdfIn PDF document text
    • http://fofuxolisemaxim.epizy.com/sasuzemivesategozizufev.pdfIn PDF document text
    • http://zugujegezamuto.epizy.com/manual_bacula_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/jabinoxo.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/bahumathi_movie_songs_free.pdfIn PDF document text
    • http://gopudagob.epizy.com/small_business_answering_service_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/budget_sheet_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/wizivuke.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_off0000ea11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA11 5556 bytes
SHA-256: 6a118077a64755c80235d7f20a711193e8c9969de46ccc38da31e0fd6580c642
font_01_sfnt_off0000fce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE4 10688 bytes
SHA-256: 9865a05501ca6bbe4de307a86e0166d2f00c29f220f3c73d2e2f68afb714cd5d