Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f5e9c977de76a7a…

MALICIOUS

PDF

88.3 KB Created: 2021-06-29 07:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 465daa54f8a2995cb8a1980edd2190e0 SHA-1: a3d62bbb7c812435e01248e9c040d8fadb6a58fa SHA-256: 5f5e9c977de76a7a0cbb49d00356f713e0f3737dec444ef89985e343800b4c55
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Numerous heuristics indicate the PDF is a link farm, with many URLs pointing to compromised WordPress sites or disposable hosting, likely intended to redirect users to malicious content or phishing pages. The document body is unreadable, suggesting it may contain obfuscated content or exploit code.

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://drafthe.ru/uplcv?utm_term=meaning+of+b+roll PDF link annotation
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608660dfa261e---zoxufajexevaxutu.pdfIn PDF document text
    • http://scantech3d.com/files/wupelemagofenadusidibep.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/a7e2c5e10ed6c400765b56f612a8da5b/duzafefogunawavipogufitun.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/8b5673f14801e2da409ccaab4b6d04e2/letatikesaxigevem.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/59752823949.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607522153617d---fipabuvasuzafonefavapibeg.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/8fe425e0eba535e092ec23c1f1bd56e3/vukiviwok.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/c4273dae7ea92e9fac2f7f49bedd1a80/mabilalonizuxomorit.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/i7r060c249v5fa2n6d4003hsk4/97447811970.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a499550dcc4---63167257256.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/19166678521.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9a17a760b---43253362631.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c32c880c3ba---milip.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/a42159e1544e50eb79c26b855638937d/gudobepopijubemapazisok.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c4966d6d7---xuzepubutazukosowakorofo.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5bb6b373b0---83084593178.pdfIn PDF document text
    • https://area5srl.it/file/wemigipizejamazavaxenan.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/42687952315.pdfIn PDF document text
    • http://charontrade.hu/data/file/guzazewoguf.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/1ede187dc19100b53661d0b5f5a09444/lobolekedusetutekemu.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160992049aa318---94420711905.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/zakewizudor.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/c360f6b4aea2fde119523a7bacc220a4/39098131419.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/72001333976.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160830ef22e735---96607731215.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_off0000f742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF742 17084 bytes
SHA-256: 8acbd6188e48d33c53e8bc3e45c8a6ee797ccbd8dd84117b1d912a4ad051e618
font_01_sfnt_off000123bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD4 10256 bytes
SHA-256: d74871e7f7523ae1880ea5d4c84746e6de44930e7a752c5dd3b6b209acdd3d65