Malicious PDF — malware analysis report

Static analysis result for SHA-256 2df509270fb4ea8d…

MALICIOUS

PDF

132.8 KB Created: 2021-06-30 06:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1bb698f08e01011dbff96e6626c02f35 SHA-1: d8b45289f1876752740fef8d710a81df56810238 SHA-256: 2df509270fb4ea8da73da7344fd3d5bbf3c814a1872e3615fb0c1383216ad498
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9817

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://crysiq.ru/uplcv?utm_term=agresti+introduction+to+categorical+data+analysis+pdf PDF link annotation
    • http://sunjewelsonline.com/userfiles/file/vovusototolofijokibe.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/8natl1aa73b4sfqj2tkh85n2v1/wewudov.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cde9751ff36---fojozunixiperurisikag.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a64c263667---gekinigilid.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/546f353c4f473b1e0404d310d527ef0b/27378870508.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/cebc7d1a9a9c1a35f3aa6a25f82c669e/zigafojawutupixaza.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/97831b72c17cf27854a305854bf7fa59/71434796487.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608012533e24a---1550466330.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/32f45bc73ff71857baa0b7d3b87f72e6/91035121559.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/7db78cc6ae8377ff32429f64d797e9da/gapofiladolutamikewot.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/56378278045.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/fugubizezafogaxiz.pdfIn PDF document text
    • http://ge-mak.com/files/fijavizigajemixiburizubaj.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca0571385a1---jonaxikagipo.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/47ov56o1comsvk9eob49873c06/76057292590.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/86158043995.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/64816722229.pdfIn PDF document text
    • https://hagepoorter.be/files/files/84371198641.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608964722fdc4---kujufuva.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a092804f9---50364154801.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/286dec75609acc5d61e9698578872374/rofopoxud.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001658c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1658C 10988 bytes
SHA-256: 58ff6155828c3eec2874b0f1e29f051859982c446838d2e4f58291b2912abc1d
font_01_sfnt_off00017f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F01 18692 bytes
SHA-256: 10f42c9302f068b39ef6ebdb610c5ec4386b974341274dad645cd8bc09b9aab0
font_02_sfnt_off0001b0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001c8c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8C6 20660 bytes
SHA-256: db6b89a0d2402f03594005bcd7697e41487740b5074db1c3d25c33970e442d06

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