Malicious PDF — malware analysis report

Static analysis result for SHA-256 dddd364bcbc4ca24…

MALICIOUS

PDF

81.8 KB Created: 2021-09-18 17:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ab0abe63abd8a68656accf893f7f668b SHA-1: b3389d4fad1ca7ee5db147cde96dab396877426a SHA-256: dddd364bcbc4ca245bc35383632d09c3d29ee2a5e81651b42cfae5a0e966a9c8
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect users to malicious websites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.la-melodie-des-saveurs.fr/ckfinder/userfiles/files/77470152429.pdf In PDF document text
    • http://jfe.hk/userfiles/66786104157.pdfIn PDF document text
    • http://asia-test.informacittadino.net/media/files/bidufibopudetekazidogap.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/e14eb3d098e5cf2228ae6bdaa5501d66/29246363549.pdfIn PDF document text
    • http://trust-law-firm.com/userfiles/file/20210901134443_386847865.pdfIn PDF document text
    • http://w-mill.jp/images/file/94174775777.pdfIn PDF document text
    • https://hetodon.com/fckeditorfiles/file/kixuvipapedozuwi.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/bagugijotija.pdfIn PDF document text
    • https://lideregitimpaketleri.com/calisma2/files/uploads/relijagozoxukoxoguku.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/jolujerunoguxo.pdfIn PDF document text
    • http://agisinfo.ru/uploads/content/files/95880189778.pdfIn PDF document text
    • http://www.autoservis-hubatka.cz/admin/upload/ww/file/97028956077.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/897f56fecdd1ed648cf85460981eb588/gadelatunakunoxozes.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/moxapofofuju.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/figulaw.pdfIn PDF document text
    • http://www.aragonemprendedor.com/userfiles/files/32413237931.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/6408666321.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/gemujiruge.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/perapuzavufu.pdfIn PDF document text
    • http://popmetre.com/news/files/denabowuweti.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/mafemanunuzewogin.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/32619343178.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=why+do+apps+crash+on+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC72 17476 bytes
SHA-256: 5c219ba75ec434a8dcb39178a63572b91a57188e7b99c9f02edb30947ccdac6e
font_01_sfnt_off00010a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A04 10444 bytes
SHA-256: 05ad3a9dbf13801e8d8ef39e455e885358894929bcd26dfa207607f95da0603e
font_02_sfnt_off0001219d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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