Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2dd7f64c495af31…

MALICIOUS

PDF

80.3 KB Created: 2021-09-21 03:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 76234ef695a7aa053b95033684fff4bc SHA-1: b137c19030afb91fcb2f3880c909161a63947fd6 SHA-256: d2dd7f64c495af311449ffacd2b2609fbf00d8a570a9009b5ee3bfec7ef5d2e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://fongyoskert.hu/userfiles/files/90384930424.pdf In PDF document text
    • http://www.pattyn360.com/upload/forum/files/semeke.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/gurefazirotuvuxiso.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/52130253461.pdfIn PDF document text
    • https://padservhosting.com/userfiles/file/bajulenuxevewi.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/49090672353.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/bchka71nshbdbel83u75m65hcv/fosejubixiloribikuz.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/xiwonanakalewolole.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/gigibejagole.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/52803293340.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/89638765383.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/pekududes.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/667936493.pdfIn PDF document text
    • http://intertravel.hu/_user/file/10424305288.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/jumoxefuwuk.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/161387499c894d---welidoson.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/15261233273.pdfIn PDF document text
    • http://najlepsietorty.sk/uploads/fck/file/45756489823.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/jerujalezo.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8bf7f915b0ab6dd8e2ac0fcf98d5ef29/lovudubivafex.pdfIn PDF document text
    • https://salondumariagededijon.com/userfiles/file/miwezesaliv.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/woziwa.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/4021254843.pdfIn PDF document text
    • http://optometrystaprzemysl.pl/userfiles/file/gewedupi.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/728f5a92b3f99088641496a69cfe7054/purakuroligol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=nomao+camera+iosPDF 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_off0000d792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD792 17064 bytes
SHA-256: 36ea92c5f76dc1e2e86aeae00f4bf97c5a44a8f32caedcafafac72a0c300aae1
font_01_sfnt_off00010360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10360 10120 bytes
SHA-256: c4b5132e01b60419455b81c0a8110c20d15fd61c3677d8770866d77f797d8f73
font_02_sfnt_off000119fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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