Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e71fda4f57232e7…

MALICIOUS

PDF

77.3 KB Created: 2021-07-16 04:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2a3be5e22854974008417505d05d35b6 SHA-1: cf79ea7dc9fd7cfc5137443a1e04fcbbc4acc4fb SHA-256: 0e71fda4f57232e7293b99a0cbaa8a506cbdfbebc8b42d3d3f9660b0def3bb6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload directories and disposable hosting, suggesting a phishing or malware distribution lure. Although no scripts were directly extracted, the nature of the URLs and the detection names imply a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfdfee53f3---81577600618.pdf In PDF document text
    • http://ilovechardonnayhills.com/userimages/golip.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/49466135120.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/70365338e0e0a872edf9f496b7ce9c22/36108118790.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/b3ad077851d72b5862cc7444f2016f63/rugigujuvuz.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd6c15dd46---xijofewuwuronezoje.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/lituv.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/a4188e1f2ffab64fa5ecfe341c36a057/ratolukikenovezuwud.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160896ed02604f---numipuwasowixoxagigimube.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/6d909a37fd73475614ad62ae92eebfc5/wudonomibumudizu.pdfIn PDF document text
    • https://lemanssrl.it/file/84885955820.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/68806619409.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/pobawowaguf.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/pokodavepixigevijuje.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/subafigekemik.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/6c0bafae6603377a3ca5eec71177627d/14917581839.pdfIn PDF document text
    • http://sns.hu/_user/file/4210513049.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6ded5e5b9---xazirakesunalaz.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/45112963933.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/rilofixeza.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609d373d3539e---91653921413.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/202mkmdae1uo9hl1gmofh2pert/kidefolabugaba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=annie+lennox+the+miracle+of+lovePDF 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_off0000c756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC756 19184 bytes
SHA-256: bceeb7f290e186cf6e0052f098b3f2dc283b36c507a9476ca3e5518d692aeb0e
font_01_sfnt_off0000f6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A4 10580 bytes
SHA-256: 88bf5fa6c63dfce09dd1b8860918c2e4a79660ba49c351be1bacbda4c3454be9
font_02_sfnt_off00010ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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