Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e070479c32b9629…

MALICIOUS

PDF

95.2 KB Created: 2021-09-01 14:22:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a1d3208c6e7527ad15575ef7636846dd SHA-1: b2fe60025a896febfe12ce9599f4218d765470ce SHA-256: 6e070479c32b9629946fe23404cecf514e24bc382c84d1e98f14a3b2f34e2198
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. The presence of multiple link farm heuristics further supports the attack pattern of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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://wroclawmodelshow.pl/ckfinder/userfiles/files/49346746867.pdf In PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/rawerefawiviladosisefured.pdfIn PDF document text
    • http://relatives-united.com/clients/75139/File/51272315030.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/ledabuzav.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/cva0lmusmcosakb8ke7opfnak9/megemizugefu.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a832a9e8b0c---jivababiponobomewi.pdfIn PDF document text
    • http://goldway.jp/upload/board/file/37593933961.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1baee39714---benab.pdfIn PDF document text
    • http://teraval.cz/res/file/60222650168.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/18858710811.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/bewisubuzalarobivisep.pdfIn PDF document text
    • https://eternalbliss.net/file/nunazuzowaxutoxozosafogo.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/636db9c9a48d7ce2a8f6f1c90da9cac8/lebarugeferejuzo.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/34771015557192685aa65d1277d5b540/gewidefaxibefu.pdfIn PDF document text
    • http://mitroc.com/userfiles/file/62794392827.pdfIn PDF document text
    • http://hbleg.com/admin/userfiles/files/3992848502.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/45833857642.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/dubogigukenamim.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/vorowitodowafada.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6db1c7a88---80412856048.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/51151101306.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/kphg1kq6tu2o1eegk47f98ecq6/welopukiwidaloginape.pdfIn PDF document text
    • http://moodyhighclassof70reunion.com/clients/2/24/24f6aee67edc386a60746049a176a33b/File/73850151147.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/60009886275.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/jno51vit7nmfg681oscfm4ncvb/32313141226.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=ultimate+flash+sonic+androidPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/414da3245a0fda58131b3995b917f9cd/ganujupo.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_off00010895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10895 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000120a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A7 19204 bytes
SHA-256: 6e4fa9748140a64326ae664c2c7bbbbb4c80cc0239123ca083e0a08355a5f6b0
font_02_sfnt_off000153ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153CA 10748 bytes
SHA-256: 8e4e205d999ad21644d1e129ba642dd0abe602e9e6ca0f9250754ea6f00896de

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