Malicious PDF — malware analysis report

Static analysis result for SHA-256 69851c3f8081dec4…

MALICIOUS

PDF

86.3 KB Created: 2021-09-03 22:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6d85571c79167c6e515916dd4aac6ac3 SHA-1: 51a1120707387787de33b709f1ce16d98bd22591 SHA-256: 69851c3f8081dec4f6c80cab179c66a4b1c4b49fb9d3b8a9c60b3c91813a7723
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV. It contains numerous links, many of which point to PDF files hosted on compromised WordPress sites, indicating a link farm designed to lure users to malicious content. The presence of these links suggests an attempt to distribute further malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b091ea128---4141359706.pdf In PDF document text
    • http://fecirturizm.com/resimler/files/nodazofuzifawuputojeba.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/ruvapewopebogumimanu.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a42e2cf8e---kolawolikikowuto.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/kosegatewazarokawagek.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/bf8586124edcc4bd13087abdd9ff148a/tegijipovik.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/lunulazan.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/2ce60037f3d3a9ec5738e39ed74d16c9/venaxunajaw.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/3de813a4048f028bbdc96d3726036562/jomesesutil.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a11cdd7d670---bubudulirap.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609052fd9cae2---xamejig.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/49013312638.pdfIn PDF document text
    • http://indel.sk/userfiles/file/bevuxesuxebakiwejeritezul.pdfIn PDF document text
    • http://cutyoursupport.com/userfiles/file/rogozudiwirawexixegej.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b881d6085---demumiru.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/vovoxajirafol.pdfIn PDF document text
    • http://thermocomfort.ca/userfiles/file/tuzonazajunevowetozamife.pdfIn PDF document text
    • http://artediapharma.com/upload/files/69571015754.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/dumowokizuriw.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/62361775707.pdfIn PDF document text
    • http://khmer24biz.com/public_image/alluserimages/files/90537091948.pdfIn PDF document text
    • http://idroter.org/userfiles/files/wewifetufax.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/31peu6mk9qu03et4qbsg1uu3hs/63123462641.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=preserve+hyperlinks+in+pdf+from+powerpoint+macPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE5 17972 bytes
SHA-256: fe6eb5d4b3375793ad51657fb3a877d7beaf31a001d0ebfa2c212c99b12329fe
font_01_sfnt_off000118e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FC 11244 bytes
SHA-256: c46b8556ea59a96ca30e37212ade419f9d6215e07941e12b5826a9bcb729d162

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