Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2d216764b64689…

MALICIOUS

PDF

68.8 KB Created: 2021-09-27 11:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f9fbe9ed75c97ec981cbd5f80aff683f SHA-1: 7001e59e88088f88504e7daffdfd96395277edb4 SHA-256: bd2d216764b64689dea99cb69b90c466eef75382a32671e3c272903bb38b026a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://philabc.ru/uplcv?utm_term=get+app+store+on+android PDF link annotation
    • http://ppogrimall.com/upload/editor_image/file/begejanovatoza.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/47824205454.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/vesutugukerewujuxovu.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/livotu.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/cc4d6d8903a1221b674736c1802cc8b7/koxorukakujupusatovilena.pdfIn PDF document text
    • http://bernendorf.ru/userfiles/file/15755205900.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/fc62f853fb0c6820b3c80dd08b98f2d4/62521055570.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/98625768846.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/8585769709.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/mekadipezupewa.pdfIn PDF document text
    • https://frisch.ro/files/file/88815157526.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/17820208505.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210902214716_xrcx20.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/93287798885.pdfIn PDF document text
    • http://suliaox.com/v15/Upload/file/2021911224574506.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/51648269303.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/700655918b27798b2d2d16118195db5e/subazewo.pdfIn PDF document text
    • https://avenue102.com/uploads/file/dafowovijigaw.pdfIn PDF document text
    • http://mawratanews.com/armedia/uploads/files/xemolinoxuxoxebu.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/10cd591111db7cc4e97b1c8ee2d2634b/guburesiwe.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/zewujiga.pdfIn PDF document text
    • http://edwindijk.nl/home/edijk/domains/edwindijk.nl/public_html/uploads/file/jabolefupanabilavub.pdfIn PDF document text
    • https://rintrans.com/files/metutefet.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16147d097545d6---vegoderazoselulobavum.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://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_off0000b0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B2 15100 bytes
SHA-256: 3ac574d644d0f399e49d97f2fd3dff55b319443c54105455db1d3b0de07938fe
font_02_sfnt_off0000ee48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE48 10376 bytes
SHA-256: 290d751ec888679105348003ab4bfae59dc714d11fa3a77ebad467fcaa9d0709