Malicious PDF — malware analysis report

Static analysis result for SHA-256 1251e7be59a4f02a…

MALICIOUS

PDF

88.7 KB Created: 2021-06-28 22:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: fb5a04ce836434221f23efd52e1ae95e SHA-1: 3a26abc304e141dc992116ce4a19aa82e9b328e2 SHA-256: 1251e7be59a4f02ae39fb90e8169a06367be65ac4e5c34539d4f446d957b65aa
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs pointing to various websites, many of which appear to be compromised WordPress installations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests these links lead to compromised CMS upload storage. This pattern is commonly used to distribute phishing content or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=supplication+meaning+in+bible PDF link annotation
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/939fef5fe4c2da5aa035841407ed1782/xikebusogibek.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608370676b499---29425288807.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/5949681767e9cad153c668b6258e1d58/71122672564.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/2e3g2h73gqvkkjd01tff4ad0o1/kepakedezilu.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160afbedc47ea0---ximurenizij.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/renalefaludafafin.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/285719ed4b27b6affff7beda02b2467f/49499048998.pdfIn PDF document text
    • https://rajatotogroup2.com/contents//files/rasipufujepupatejarelim.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202106280033296479.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff885da099---kujanisajekugevajabafer.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/26126aa9860033905f0fa14ae9ffb732/11523851733.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c99300e134b---pewupurogufikogonojanaku.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609153e1148c3---jemilotozadaxisabo.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/52743151436.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/92942801489.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c158f558638---vigojupikaxatejaxexi.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0546a3f5e5e498ce3eb5aa7dafcac87c/27048414364.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/wevewatanog.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/16088495035.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b864ed06a2d---tosatudi.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae94776204---burawobitipusifukaditoxa.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f29ffc613a---pijifad.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a714e68678---vuvomezojazaxajuk.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/4fce4ee16bbc426f7789c8f5b36c52d0/diwagexakunugoguwijozew.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/ae998ced68676edd533132fea658f1b5/21580283919.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF780 10764 bytes
SHA-256: 089a39236290e24e349439565f3a1e73f3a43b289dc6d5c06c5eee5c38a7731c
font_01_sfnt_off0001100e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100E 16840 bytes
SHA-256: 5f631687a5abbdba748d22116f766cc5e8ccb6397bf6cf8c9752e168c0d728e9
font_02_sfnt_off00013bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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