Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20d912e67b770c3…

MALICIOUS

PDF

78.2 KB Created: 2021-09-09 09:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c7f3a26897999f95e1e59470b95134c6 SHA-1: b4aac5c1048d0b049996c73ed416b1cc88a415ef SHA-256: e20d912e67b770c3da3d008d668cf705de8906fb3a9031d4fd99df642d7a69cf
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The presence of ClamAV detection and ML flagging further supports its malicious nature, likely serving as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://tznjl.com/userfiles/files/pexivudejopulewufupisevu.pdf In PDF document text
    • http://hbisan.com/userfiles/file/tebokafabedutasoxodis.pdfIn PDF document text
    • http://jadeite.ru/images/file/nodur.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/071cde49d18cf2a284a224e31820bd80/44021873033.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/jaxilepojexe.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/73912452566.pdfIn PDF document text
    • https://stoneappeal.in/FCKeditor/file/66447485047.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/63772138523.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/98086087871.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/dalofijasopurogonijenisa.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/14224241924.pdfIn PDF document text
    • https://emtracing.net/userfiles/file/lulataranuvawamixo.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/vukebixeselesox.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48712120232.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///53641887979.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/57590745067.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/87997471805.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc6ffa0d95---25749187915.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/wowone.pdfIn PDF document text
    • http://snft.ro/media/file/bameja.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/36036855043.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/5g1hoot5giv473ocibjflaiujp/wenoxis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=pdf+a+word+apkPDF 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_off0000d0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A9 10028 bytes
SHA-256: a5212d06f9b422e9e8fc4378ebaa432938c10d031fd1c055365c06f683b1cbfa
font_01_sfnt_off0000e71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2C 17496 bytes
SHA-256: 9e69315898fb79791dbe9d0b182adf21995a98f526c3b7ea079fa1a6fed164ea

Open this report in the interactive analyzer, or submit your own file for analysis.