Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe0dd6d6f94a654…

MALICIOUS

PDF

80.1 KB Created: 2021-09-19 07:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 69cb4c24410e765ed43dfc3b18c84cff SHA-1: be15ac0e698fc2538a63350881a055adaa54b9df SHA-256: 1fe0dd6d6f94a654ff50e4a51113c57d129b20fed89d34c59efb7933e1bc9a4f
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to potentially compromised or disposable hosting, suggesting it functions as a link farm. The presence of urgency language further supports a phishing or scam-related attack pattern. No scripts were extracted, but the structure and URL findings are sufficient to assess its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://steelbo.com/uploads/admins/u0/files/20210901213607.pdf In PDF document text
    • http://haokunchem.cn/upload/files/depodiropulibozutefufesu.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/xomeje.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/82325336354.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/zenetepulakoxib.pdfIn PDF document text
    • https://forumsevens.com/images/file/46786971503.pdfIn PDF document text
    • http://p-jtech.com/userData/board/file/85584393437.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/bti2qa2kn4830clf6l9q429e43/89544082772.pdfIn PDF document text
    • https://widerbet.pl/userfiles/file/gagazituwetekebon.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/95443773301.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/lojigomisid.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210911050820633290c0our.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b937e330a---modixolix.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/26762409033.pdfIn PDF document text
    • https://fultoys.com/userfiles/ferapuzezi.pdfIn PDF document text
    • https://subarini.ro/mm/file/16916963276.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///xewutosiluxi.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613596b23144e---jazeregibugevuvirodilusos.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54617711919.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/wewigunulojilezutavu.pdfIn PDF document text
    • http://zae.me/datafiles/file/zosarogivobofejo.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/55563120890.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=convert+4k+to+1080p+androidPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/4104a78924d9a2e2087ef0d4865d56d7/nosesagenuzugolexut.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://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_off0000d2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CD 18080 bytes
SHA-256: 32457d2dd2069907cbde62d6febc053fb06280cef8aeb304966a2656266f5971
font_01_sfnt_off000101f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F7 10820 bytes
SHA-256: 5b65b531bb61197dbf402314b0e955869818237fcfd89e8574d98d82d896fafa
font_02_sfnt_off00011b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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