Malicious PDF — malware analysis report

Static analysis result for SHA-256 2caccb6f27bbd2a2…

MALICIOUS

PDF

76.1 KB Created: 2021-09-28 18:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 60e1d05152a4dcc5d7d2ff3c2afa4f9b SHA-1: 1622306683ba977d9993b7d6ab4c7adcce320b5f SHA-256: 2caccb6f27bbd2a20a9e37061ce8768520a235cda2fcb256cc7c6cb517b68824
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/56d7ef1f89bfb22542816d22ea439645/73348172884.pdf In PDF document text
    • http://appartementslisa.it/an3_Uploads/file/47724229540.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/94815179273.pdfIn PDF document text
    • http://maurovalleferroarchitetto.eu/userfiles/files/jolebatonezibuxowale.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16139c4959baac---norug.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/0a55301712cfa8a54896b656d42258a3/reximofezalotusakupop.pdfIn PDF document text
    • http://ychnjl.net/userfiles/files/mekejibexesawovi.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210901054406.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/tenasetitodefuwizipaw.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/72729055867.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/kobetelirimasuka.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/44275177152.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11058531982.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/87337794326.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/pusopajegudomerewevowex.pdfIn PDF document text
    • http://inteko-tula.ru/f/file/tepurexala.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/ferabosulirinuresilajed.pdfIn PDF document text
    • http://3t-t.com/User_File/UpFile/file/20210924032743_ODUwNzg4Mjc2ODk=.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/5v47e8n7m24jp2c004pmrc49b9/dadopivufiginukole.pdfIn PDF document text
    • http://cbafjvn.com/uploads/userfiles/file/115786577.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/40904732082.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/legesevunugifu.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/98179330849.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/89266542335.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=aimbot+phantom+forces+scriptPDF 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_off0000bf5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5C 19604 bytes
SHA-256: e501de487e2693e4c5a0cb7cb30fcbde662ed420cac2ac1bb2f8892ce6715948
font_01_sfnt_off0000f26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 10820 bytes
SHA-256: 084e37efa946dd41e44830778c1e409826d91cf2f06c97dc0117298c6a8ae7df
font_02_sfnt_off00010b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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