Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f95fea0be4210b…

MALICIOUS

PDF

70.6 KB Created: 2021-09-05 09:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6efecb090415b0604f374d44b1e8ffdd SHA-1: 6d5508520acb89917b15ec9e1ad5ab6e48f2d49e SHA-256: 01f95fea0be4210bc009b4beff958b4b63e50441efa476cf0ebe11987b2914da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm, with many URLs pointing to compromised CMS upload directories, indicating an attempt to host malicious content or redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088165c213b4---waxon.pdf In PDF document text
    • http://ricarda-allegra.de/userfiles/file/57502028870.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a28cec22e32---rufuwadara.pdfIn PDF document text
    • http://atek-ent.com/upload/file/rekokiwanewupugometerufi.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/8277249114.pdfIn PDF document text
    • https://topjobsnepal.com/ckfinder/userfiles/files/zaboborikixin.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/mopazalorakavizufojuzak.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/nulezupolezubasoditugobu.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/suwojoletivasiwuberoso.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/69155571268.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/92787759569.pdfIn PDF document text
    • http://rhondachem.com/d/files/24340103008.pdfIn PDF document text
    • https://o2opr.co/userfiles/files/27944193119.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/717e9eade714b909868b30c7e6994b37/19825602046.pdfIn PDF document text
    • http://twothirdsmajority.us/clients/38522/File/87931604662.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/rijoritosu.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/krtdosjnp0aalokmh8u6onkifd/bivetukir.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/1vdoldnkrdkjp2n69kocrl9cub/sukiliropurumek.pdfIn PDF document text
    • https://drlanda.hu/user/file/65659782132.pdfIn PDF document text
    • http://topstec.com/d/files/xutipe.pdfIn PDF document text
    • http://udemadriatic.com/userfiles/files/fevetubi.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/80936074668.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=suzuki+vitara+2011+manualPDF 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_off0000b29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB29A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB1 10536 bytes
SHA-256: ad2305d9db250636285cb4a6076a4fc5c5247ebdd36d39523313380a006982a7
font_02_sfnt_off0000e2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CC 16024 bytes
SHA-256: 147e91fc3d0084f7140ba117ef6817537bfeeb65a42737eeeac4a9d84f902bb1