Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fad2f00df45fb1b…

MALICIOUS

PDF

75.8 KB Created: 2021-09-11 14:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1e8469e990c0f488b1936afbc1e92708 SHA-1: 0113c968850900be746a7036bcac6d7678c3a5d7 SHA-256: 1fad2f00df45fb1b67a73b00c152152e895543976d4c9656b7f10550c7a8af57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicative of a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://cobansut.com/userfiles/file/xivogaladagujes.pdf In PDF document text
    • http://flairpens.ru/uploads/files/55135059162.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/67175716407.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/pebax.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210911_BB89F767807707C5.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/surubadobabo.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161311fdf5b5eb---57970106304.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138a3e0db65d---wodirigopegab.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/3a9006909f4802fa079b44fdc1594543/84576976515.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/25096368601.pdfIn PDF document text
    • https://wupaojichangjia.com/d/files/64434431763.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/degirexebojupinuraxelusa.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/9351860812.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a270868b8---58167648032.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/nijigabuvorid.pdfIn PDF document text
    • http://optometrystaprzemysl.pl/userfiles/file/62334531187.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/sumupi.pdfIn PDF document text
    • http://cachnhietwin.com/luutru/files/37388043414.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/rukatuvoligimebiluxata.pdfIn PDF document text
    • http://lg-palette.com/upload/files/ritamofalabuwexerapimivo.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/50122738520.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=cross+dj+pro+apk+freePDF 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_off0000c30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB21 18088 bytes
SHA-256: 0473e3bd7134397cf9432c13cad1d5e6ff1206e9c87c0d987e77e4b286442957
font_02_sfnt_off00010a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A35 10404 bytes
SHA-256: 4881e616a2a1cc0f31e6a3eaf781eba09b9575c6e7077551b927be1e334f1ce9