Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6fee8be021fef7a…

MALICIOUS

PDF

88.0 KB Created: 2021-07-21 12:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 06fb87705b2bd13724a17828f4ca9db8 SHA-1: b44235df75a640a01f8e777cf217edb046d79c3b SHA-256: e6fee8be021fef7a1ec08c3634d7b00e762d6d0642eb69fd58667058315742a7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a link farm pointing to multiple compromised websites and disposable hosting, suggesting an attempt to lure users to malicious content or download further payloads. The presence of JavaScript indicates a likely execution of malicious code, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://holocaustresearch.pl/nowy/photo/file/37829065563.pdf In PDF document text
    • https://deesudcoolingtower.com/userfiles/file/91244701792.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160bbccf3a28bd---18249295298.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/buwonitedolapulubaxaji.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/reroditowovapalobubof.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/86027424589.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/folujafujukuse.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/xanenovemesipixow.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/walinetuzi.pdfIn PDF document text
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/86037643295.pdfIn PDF document text
    • http://kadernictvo-svetlana.sk/editor_uploads/system/files/38118889938.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f049ba98b83---nulorivifix.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/31843633966.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/8036592579.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16077212c1a607---mosezipinumetu.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/391231df4a85924be5214f06eb562af6/gusevug.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcf067edd1---86453292183.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/65710174035.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/66m66cj2k8jor936960grq5sl4/rezikatebarenurilin.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/62552596334.pdfIn PDF document text
    • https://superpart.com/files/27221085116.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=example+of+business+proposal+powerpoint+presentationPDF link annotation
    • 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_off0000f342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF342 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B54 16820 bytes
SHA-256: 114996039bf7d1b6e4bb2715058de69dad7d606e653e2acd208a5bee1f4923aa
font_02_sfnt_off00013748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13748 10928 bytes
SHA-256: 012701ca172857e172ea1de2409c956ccdfa233e8df17a1c576df2ce5eed1aca

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