Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa89c2303aceaaa…

MALICIOUS

PDF

102.3 KB Created: 2021-07-01 20:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: adbb89101ca36eb8861d943c4e7b03c3 SHA-1: dcb2c4d8cfa482ff94d5f5fd1915e9b8d95caae4 SHA-256: 9aa89c2303aceaaabd43214549685899c3c786a8f7b3b0a451d34c443b662294
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit users through deceptive links, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://allianztc.ro/files/file/2752919497.pdf In PDF document text
    • http://montaze.org/democms/userfiles/file/dufuwukegeriduki.pdfIn PDF document text
    • http://webursitet.org/Files/file/lepafifudosebotalutegopal.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/39096258216.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/42382635485.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/94398814968.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/150367bce4b58d032af2467bc93037a3/49085366992.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853257204f3---40209118087.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/32216903604.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ff492e585---40506653144.pdfIn PDF document text
    • http://brlairport.com/images/file/josonelupozepep.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210604060447-39951597760.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/somogijo.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/xokujerenip.pdfIn PDF document text
    • http://polipack.ru/content/file/41698667177.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160cc3b4303120---dasavupuwupewapozatugub.pdfIn PDF document text
    • http://www.asslar.de/downloads/sovurugokujumuxe.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acd0c513fca---93958907769.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/xefojakamuzemeni.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/8bne2ji17gak9kcurbks6k48t4/95089547707.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/jukogibu.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/12527396680.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901e5e1019e---85012697351.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/8c086b92a32740c36301e56fb8891112/53145525380.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/d88ef4baa3959a70d269326fac2a7068/pikatonelukuwokolisuwimo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=disciplinary+misconduct+meaningPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D10 17324 bytes
SHA-256: 06221cfc27fcb5e12360e7239ba0f75b9324db4e3ed6e95be2a53f0929352181
font_02_sfnt_off000146f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146F9 11072 bytes
SHA-256: 770bc40e40ab6d1d47b165190523532e2e9b57caa5f4fdb717a511bca54c6df0
font_03_sfnt_off00016094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16094 16440 bytes
SHA-256: decf8794716c28016c2e0b57684bb53f28a510fede031220e8a96a8b0aa11e51

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