Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04ee97c17380755…

MALICIOUS

PDF

83.6 KB Created: 2021-09-02 04:38:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 04c524661cc9808f4706f8cd240109b4 SHA-1: 4ae8e19a6ff56edbb8797323dfe39afe43cafd9b SHA-256: d04ee97c17380755b1b26a506a682ad8aa535bd5ed212e494e2d4def2e5332c2
196 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://archism.ru/uplcv?utm_term=50+cent+put+your+back+into+it PDF link annotation
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/7hk9lqau8g5blesm21rsju48jq/84311739123.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210704025353_k4erv6.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/xopativodaba.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/fotodazosupexetuxikem.pdfIn PDF document text
    • https://kuraniterbiye.com/resimler/files/borusadolebukemipakegenab.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/vejobesanefuxageta.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/74554834510.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/voburebevebemug.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/78524680298.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2fd0722c2---60709754342.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/08153364a21370fe4f27dbf3e39116eb/vanareniraxewijexunu.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c5341d97c---24772287028.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/62270215636568a3b69bd515913b0b1b/popapasuvagufidilovoxuzo.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/93014544081.pdfIn PDF document text
    • http://perila-vrn.ru/userfiles/file/fetafa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086234a44c29---56286636593.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/pofalefimoxowarutaze.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/volodevipofezoradilana.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/36937590281.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/7d6f16c4ca20405a988cbf17f0cd1ff4/bifajida.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160807c8b5379a---lilijajawuzajaraxolok.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/2688087156.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8923d2ae9---sokotazojupaj.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/tixulewedukux.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_off0000e025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE025 18216 bytes
SHA-256: e0a38a4905470f4fad8fa38a0259726c5008d136582f3160ca9e32bd108e4994
font_01_sfnt_off00010f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5E 10756 bytes
SHA-256: 46a4ecdc37c600132a3b2b568a124d5fdcafe6a91e75ef5e23b6276349ad0128
font_02_sfnt_off00012812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12812 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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