Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3ab29b1156f87e…

MALICIOUS

PDF

119.4 KB Created: 2021-08-03 13:37:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bba6603fb987475cf065dba2320817b2 SHA-1: 9e6849b6ee104db09842cb527701779ed19b3548 SHA-256: bd3ab29b1156f87e7c8b28ad16f936a99c02af8d01644d19962d52812fd6461d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to compromised CMS upload directories. These links are likely used to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nscs.org/wp-content/plugins/super-forms/uploads/php/files/97f3f86de53a4861834442e37acd4daf/pubilux.pdf In PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/9cb2186d4e4078f645cf2da9bc995e13/42154137516.pdfIn PDF document text
    • https://martabaktelor.com/contents//files/kasesimokuvuwuke.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/76234766936.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/86873165103.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/cf27ad9c6316077ed04f19adfef1f36e/fivojimavomakofi.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a972cc98763---70663940174.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3ce5359413---21498835758.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/0f6a540aa966a6376119e3206d378930/16007999547.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/nqi8kultkel3is0b9id6ud3lcd/5711812403.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/girajipevojotomozen.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/av0rni1c897ivm7via9ut1ft70/bafusowekotixavabeteziro.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/9904d38455cb27a852c972294336d146/94315492279.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160825b8162a58---tufimopofuzifaz.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/kanomuzegopaguzifonariva.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b496d4a7d9c---82625333218.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/78289b91f8f9dd4854b2f41a5a7c6eae/pulaf.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/e66c51f56332c87ea490ec5755ccc119/vadawoput.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/lokanidejibamasavapel.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160905b6fe5cdf---55274772647.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/mofpporu4svdqpr5hafj0cf6t6/31748994212.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=barnett+vortex+bow+manual+pdfPDF 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_off00016f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001874a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1874A 10944 bytes
SHA-256: 3bc36fbde7d7359a9f4867d938ecbfdf3b618efe651bc437cf3c4ebadde64925
font_02_sfnt_off0001a084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A084 18092 bytes
SHA-256: 9948c64607f1ea873760ff5bd6272260a5e4c30fd613ff5b25f1994e62b765b4

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