Malicious PDF — malware analysis report

Static analysis result for SHA-256 22248ee2d3310ae1…

MALICIOUS

PDF

84.7 KB Created: 2021-06-14 10:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9baf9b8efeffb6c1ab80e4bdba1476b5 SHA-1: 942ec86f8842d2dbf7d8979553d5f60a28c92e68 SHA-256: 22248ee2d3310ae11afb79be1c87809d6f553a96be4a8129d36368d6db199533
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://krisoc.ru/uplcv?utm_term=jitni+dafa+dekhu+tujhe+dhadke+joro+se+video PDF link annotation
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078105699f27---96000240523.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606d599bb50ed---89549472071.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/29629511057.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/q84hm7v433dgmlarh9dj3c5bp6/72347821461.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/51077980132.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/waguzalusazoji.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/dccbc1ab2deed1e03fcde4cc85e03ffd/buzeraz.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/b0dc9481ac9231f278f51f945e56799d/bawedoda.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/2a11038b82217b9322c077f1582bf3a8/simipimiberi.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/fatovekawokituzebosemewuv.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/gufewupodoloxagafabor.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/2ie3srnvl0895rl9umb5oqrrh7/67316064657.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947cf55e1fd---74249251154.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/c98e5b380739f22d83eb744015e30308/78399222437.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/3a2942fbee3dcb6249a822d626b01e38/29939703300.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160792d7a63c0e---13367254730.pdfIn PDF document text
    • https://thaihoanghung.com/upload/files/47954323087.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bba89280dae---84390113484.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60B 5152 bytes
SHA-256: b28d0fe34daef9718e9a7edda6bd396c51a366a72d2ffbcc6f442402d48533df
font_01_sfnt_off0000e793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE793 3240 bytes
SHA-256: e85f83fe1eef227ab1de8db075d8a9b78c13386c4b7f88d456c2461880a4e879
font_02_sfnt_off0000f3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DE 11840 bytes
SHA-256: 3f881520a22f0ab2fdfdd31ee59d9ac3478cda895143bd09f62bee7ff386e63b
font_03_sfnt_off00011bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB8 17248 bytes
SHA-256: 807345487bf5248db7968224f8c3ed12bddc96f3dfcf84a21dd9f0b68738a988
font_04_sfnt_off000134ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134EE 4016 bytes
SHA-256: e5901580633b38eacb68e38e0ec5206454af191837f4b53cedb4c175be252753

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