Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec68796684a6fe5e…

MALICIOUS

PDF

80.5 KB Created: 2021-08-01 02:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: eabcbe34b88af829b00b4faf032eb84d SHA-1: e975630eb83d472fe3d761ac9330a5f88d88ed48 SHA-256: ec68796684a6fe5e895be97a966e9e6886bc65a1621f8593f042121807a6091c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary purpose appears to be redirecting users to potentially harmful content or phishing sites, leveraging SEO techniques to appear legitimate.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/7ma5mjbfgcee01hbf86joctia2/29057304891.pdf In PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/5b1c85152aa92583b670c04cd1c66b04/nusafelujonareba.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/43450000005.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/tafixime.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/17315b53ecde84e26bc229566644a210/82481034439.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/vamevepusupojukikibupi.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021618631476407.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/mekebabakodanutetore.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/betusokiliziwazak.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92425e280e---xoporiva.pdfIn PDF document text
    • https://yellowstonewildlife.com/dulidofemaxinalixurejo.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f980123943---siwejuladakavibez.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/badepuvogupinegutasimuf.pdfIn PDF document text
    • https://lecapsuledigian.it/file/muzimodutiwezu.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/jadosojop.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/jegutaretureravupavit.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/35640564692.pdfIn PDF document text
    • http://samsung-service-center.ru/uploads/files/bosizunijanisemuvem.pdfIn PDF document text
    • https://tanthueviet.vn/img_data/files/wikapalivutoweseme.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/0ee3e97cf312e72cb792789c6948c43b/melupugidigavubedu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=why+is+my+juice+wireless+charger+flashing+whitePDF 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_off0000d3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A4 17720 bytes
SHA-256: 2a8bf82c48b570ec7317da25afb1e84a1b2830f19c2c23ce29e62de42e02c5da
font_01_sfnt_off000101df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F6 11088 bytes
SHA-256: 99ca3af91b7e195b3513fe2d7ede03848892a51f6f2579d40af43ac44f42b15f