Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0c149f79c4ed41…

MALICIOUS

PDF

125.6 KB Created: 2021-06-30 21:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5a33c09426ba2da5e076cc0b0bb14ba4 SHA-1: db22d82f7a3bf2d18a17a77353f96393aa7aa401 SHA-256: 9d0c149f79c4ed4129c39aa5eff32f3e6e37a1580b6f705cbbfbe48388050f90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://laborke.ru/uplcv?utm_term=sentence+for+paragraph
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e75e86e3adc8b4551a107ef5b921f016/xurawezunutimib.pdf
    • http://falerisztika.hu/tmp/4907443800.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/cef9c1f19e71aa05ddd91247e64e4bc7/wugiwederekakigijeduxana.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095870a4a3f6---woridosaledexefagejirale.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/c31bc921981ec7af35ac1c595cc6d73c/32583577430.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16074939682ca2---89189506305.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d097f1c6d0b---37297929626.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/qssnimpead6hqltt0e0us9upni/fopojimaxikuwa.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1216ddf00f---duxamibipuwibirab.pdf
    • http://ewhamd.net/upFiles/ckeditor/files/lokegewojilumutiribavi.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8a6e038d4a---490062554.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/53e4c2668fb1b2bba4f27c149d48a2a5/52120249378.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cca0886611---pawulejadotobimitapato.pdf
    • http://hakkabrothers.com/userfiles/file///tuxul.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/8c7b5b3987617b89797db14c97d6786a/wilidi.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/7914orb569em8sd6pot2682abt/vavesiwateni.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940a9f9dd26---bajebitefugowefesokowo.pdf
    • https://humicdp.com/uploads/2021-06-11/images/files/66776245056.pdf
    • http://ansonseatery.com/uploads/files/43110790677.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c1328da89---tobugepoloxobawitixuz.pdf
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/lutoxesolida.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160affc5c1c535---68877535564.pdf
    • http://coumert.com/images/file/satefuwedumoj.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/0dfaeb825b4ea66c3d945a1ddec4a66a/23617042864.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bcbb124f2---jibututa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000187f6.bin
0338f420f66fec6f7e18b167dfc5bba2737f3b6c9fc0d2f836aa447cc9098843		 pdf-font-stream PDF embedded font (sfnt) at offset 0x187F6 18032 bytes
font_01_sfnt_off0001b78a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B78A 16792 bytes
font_02_sfnt_off0001cfa1.bin
cfb88a6e1cf9a3ce057c96112be2fff94fd733f6045677a66a8da27b2e7a5a8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFA1 10528 bytes

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