Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d975f85aa31945…

MALICIOUS

PDF

87.7 KB Created: 2021-08-14 02:11:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a4070a68362647ebf0f8d7463e0a773d SHA-1: 34c3dd2d669a6b1c33b00eef8cd35847b7185686 SHA-256: d2d975f85aa31945a37e0e35e0a69561673ea230ca60c8a967f26153ad4b827d
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous external URLs pointing to various websites, some of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://linklandhotels.com/upfile/editor/files/61605593270.pdf In PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e971a03d8d---litalosiwop.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/a69be5afd79603161df57ea1e241b184/72141947192.pdfIn PDF document text
    • http://agama-rc.com/upload/files/nekadafunofapezuxo.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/bukowusotesewe.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/xavumuxedaja.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents//files/12692457641.pdfIn PDF document text
    • http://peusch.lu/userfiles/files/20989258100.pdfIn PDF document text
    • http://austintownfitch1980.com/clients/879833/File/mifitomewewidabobenigatil.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba938a1501---42367595957.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/57639414568.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/bifuda.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/vudafilisafoluj.pdfIn PDF document text
    • http://goref.ru/files/file/nojejaxajumawumufa.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/46186459282.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a048a6238a3---66146676419.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b32bedc63d---dezugon.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/a29c35136712ee3c48418ae5c667e20a/gefapupovadexik.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/8ed5c077874244c6b20ffe2fdfd5a672/pakezoxuk.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608940b500b13---zibigejegiwofelidoluf.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/murabixunu.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/82183299697.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160873ba8d8771---jedarebe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=%C3%BD+ngh%C4%A9a+s%E1%BB%91+1486PDF 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_off0000e6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F9 10620 bytes
SHA-256: bc0535ee28640190826e1e4b1e29b3dd827a83e250bc184b0809c8005797f379
font_01_sfnt_off0000ff4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001175d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175D 27864 bytes
SHA-256: fc983671ec0201e2d48e0bbdbcd50997cd9afd529d570606c614ff955c592725

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