Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8aecd002d183cfd…

MALICIOUS

PDF

69.8 KB Created: 2021-07-19 07:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c2a8bb7419d2c3eff659b5e63ee7d0e6 SHA-1: 4f906b688d956cca71c55da57a0d7f1d06fe4835 SHA-256: d8aecd002d183cfd0f27d0efc802444fa8b8589e5f0ae7d7af0e273177c9d4ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The document contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/a0f22f28a5ed138fd473e9586b9162d6/kameravuwu.pdf In PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844d13a0128---86155841572.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/86502186175.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4e6245815---wufitebimekimowozoki.pdfIn PDF document text
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/8018853203.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/50586947558.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c02288b8b1---donojudisopekibixojaginud.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608324bf20e66---fubamibagupibivafomuz.pdfIn PDF document text
    • https://capecoralliving.com/media/file/39123496789.pdfIn PDF document text
    • http://cortabellanews.com/userimages/64628299738.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/a8bd9fc7e8d9b4eff22de4a932826da5/16851763862.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef0378db4a---81648180103.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/17649827682.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/95b9edb35e75036c6222f84579a1c734/vezutukemokapemevad.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/rumetojebekuxetar.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828e57214fc---zizuvepikojimidovonexogiv.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/banezunalopesupoxofedetab.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2ed3259ac---najelem.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/vesalekasifubanasupepoxel.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160adef87863b1---rerub.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/xojozanexokebebarinup.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/228cvd1vorfr44taqjpi74k401/6920011393.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=count+na+values+in+rPDF 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_off0000b407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB407 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1E 10300 bytes
SHA-256: 3a02be542f1ecc4b91faf7432f14a603c3540051c0d482ebfb626b8c4b855ae1
font_02_sfnt_off0000e388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE388 14668 bytes
SHA-256: 9b68666b6cd8b89b6b3b06ca686c3675a7e65c531dc4e3c9251f2dfa15a104d8

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