Malicious PDF — malware analysis report

Static analysis result for SHA-256 801a2135e0ff9425…

MALICIOUS

PDF

89.0 KB Created: 2021-07-02 09:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3aa38de0f5232612dc2419a713c51f6b SHA-1: 9ccd5fcc042659147755d57674a01d58e3ae93cd SHA-256: 801a2135e0ff942552c49d8a98f35534e3f4ddbf6862c96ad13fa94e0f92be39
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a common malicious PDF distribution method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/2458548f7e387342f7e423eb16cf49af/xosofoseduxuxexoxafolavez.pdf In PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/e2pjdd313s5i5vnl41kodlskok/demakikuped.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ed822bf461d3a673c9dbd1166ce0372e/rijutimolufitor.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/9413a41a34879adeb20c25002bb5888d/setovu.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/xipedarafiniwenefukova.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/6780014566.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737921358d3---rujirilunumufalupuputoji.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/0cbbc5dcd2d32efc833b87232597c37f/84414048563.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/gapirorobomaxek.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b516c6c9434---90458311196.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/92950600387.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/74590276442.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/xatizodujadomowubo.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/busetufuwetedaxav.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5a2394cc5ce5c4284a2465430429dd47/wusuzebejugagemujavo.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/0523a0e91c5944b0f73f78588ca7741a/682405095.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/7ec89ee4778229aeb9a3cccc5bb806a7/74382694644.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/mjfe2igt3286phgiu49skgmae0/litenokale.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/nifirufukotojegaje.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/aa88a884341c576a88a478cce7cad12a/tuwap.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609c248b49a26---35289373543.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3867d9f052---dojul.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814e5fcc402---83534763066.pdfIn PDF document text
    • https://digicpictures.com/downloads/61405092018.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a30a75955---27216646585.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=uncorked+baldwin+placePDF 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_off0000f811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF811 10568 bytes
SHA-256: 30060b93e6f8d1ddbaf918128de1dca4712634a51770d3aedc9ae1253ad9e3e9
font_01_sfnt_off0001100c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100C 17692 bytes
SHA-256: 5792525da1b2bc073eb64f710b61dec1945bdd77a78b325dda646d34f7adadee
font_02_sfnt_off00013edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1