Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9b5de29312be38…

MALICIOUS

PDF

78.5 KB Created: 2021-09-01 04:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 709af3db0802d7973ee216288e26b9f9 SHA-1: cf6bd27416f80cd9bb3cd45c8cae8087d4e069ac SHA-256: ee9b5de29312be381a5cb0ae07ab0d72181dc938204dbe5123ceb7700412aad8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as Pdf.Phishing.Trojan. The numerous external URLs, many hosted on compromised CMS platforms or disposable domains, suggest a phishing or malware distribution campaign. The PDF structure and embedded links indicate it is likely used as a lure to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://smidgel.ru/uplcv?utm_term=do+you+have+something+to+say PDF link annotation
    • http://conomiya.com/images/uploadedimages/file/44304739824.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/43387055295.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/96446473691.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/05a0d5e5288a1351b52ec608f7f07773/66333834758.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/85179219440.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d19ee958f4---79374104088.pdfIn PDF document text
    • http://www.bash.cl/media/file/rarap.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/1n6ngeuqtdf7f3lv04vas87fmf/90392615797.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/wafak.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/57113987102.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090c152ea7e8---60349566454.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bef8527e67b---menujufabonefagenad.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/kajinagekakafezalomikov.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c7844a246ab---demitasito.pdfIn PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/gubimupufubijoxokugowa.pdfIn PDF document text
    • http://cocoal.com/uploads/file/94004274234.pdfIn PDF document text
    • https://isosklo.cz/uploads/didirinoxe.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210620_222522.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808f9e20efb---97758410029.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/relokewisoji.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/b41ec877dc54e43f88e01f3b1ce1e552/67902878032.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c0d02c202877e89c68fbc72cbab49e9a/77593874079.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/gapamigoper.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_off0000c7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C3 20396 bytes
SHA-256: 7bd29704e9c07d9c5a84758bb63a65674badc12531620f3dce38ab78703c6824
font_01_sfnt_off0000fbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001140f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140F 10692 bytes
SHA-256: 87ccde4f2e70a7fffbfc2c5bb8ee7941104f27d3662428bd72735d8397a2b44e

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