Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c2278c0ea8eb2c…

MALICIOUS

PDF

88.7 KB Created: 2021-09-08 05:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 589488690986441225b5c62e59ee9f4b SHA-1: bc799e7da68933afc23452d240ab3d0e9d7f6870 SHA-256: 32c2278c0ea8eb2cd9e4ebb3176b4d6b02b102d964359d8d067cb56d12ac80cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://drafthe.ru/uplcv?utm_term=sigma+speed+sensor+manual PDF link annotation
    • http://interstyle.org/content/xuploadimages/file/lifukarilizafaredavimur.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/94489804210.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/nuwiruga.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/roduxujogagorafovax.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/mikeno.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/85406080560.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7eaa75588---xijadu.pdfIn PDF document text
    • https://svetplus.com/userfiles/files/damegelepav.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/1n9pc5np2552uuovebrdvogdji/revojulivox.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/bbdebf0310a25344ad3dac6e2ba03f11/juluvepaxeje.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/tiupq1ogq7dubhugi3lrpo9bri/89643905102.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/0c0b5c5f9b4faa1f0536a0a1e075af4f/zodufetonuduvux.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/83796856556.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/1ea30d9563346ebb116e15fae3078c68/201167147.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/nijotudademamep.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b423746d2a---85697393988.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1628348568.pdfIn PDF document text
    • http://doublehaircenter.com/upload/ckfinder/files/riganuw.pdfIn PDF document text
    • http://nazycakes.com/userfiles/file/gidugetud.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beba8788021---87399628228.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345c39c021f---migedexedajaj.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/rukexufelexikegezuxu.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://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_off0000f592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF592 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA9 10812 bytes
SHA-256: fc2faa48d82adf40e753c79dce0ec47b8e1d11673b66cfd5ee3bc2bf522cc00f
font_02_sfnt_off00012646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12646 19228 bytes
SHA-256: 96f906e61cddef3ba0dc251016848d7dd700b167ed6fb09cacff2081ad2d64a9