Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd782201abc45e0…

MALICIOUS

PDF

99.5 KB Created: 2021-08-10 17:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74c294ecf17a27a70d07acf92e685be4 SHA-1: 86eefc3206fe4670b41d764d83b5f2796082b5bf SHA-256: afd782201abc45e081f8a1df424e6b63e1bd102071858455822889c3f9a016d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 6

  • 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.
  • 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://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/1c9f18679e150a22fe39bc401fe85825/94981131272.pdf
    • http://theclubburger.com/uploads/files/lozilapipoxekeloliwof.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb02841e49---wetedut.pdf
    • https://mfdesign.hu/files/file/40352421421.pdf
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/6673968093.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce158134f67---gupekugepiv.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc13421c13b---rozoxakumarawigakozir.pdf
    • http://cayxaotamphan.net/userfiles/image/file/18019124577.pdf
    • https://repare-ton-smartphone.com/userfiles/file/24088764917.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab2b6cd4c1---zoxisofuzifetowurilirog.pdf
    • http://geredekombiservisi.com/userfiles/file/70348397358.pdf
    • http://slanfusa.org/clients/47225/File/81672205379.pdf
    • http://mkngsp.ru/upload/files/bevelesalutozewitovuzote.pdf
    • https://binarbaidfabrication.com/public_html/userfiles/file/24357343647.pdf
    • http://iviltra.lt/images/files/vurivafumikijufodezafad.pdf
    • http://jtour.vn/userfiles/file/wazokavovikapuvubineke.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c1db6e21a---71299620391.pdf
    • https://cambodiadriverservice.com/userfiles/file/vivikokule.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704d983e0c9---13331273052.pdf
    • http://evevoyance.fr/adh/.-/file/10449676056.pdf
    • http://sladkiy-ostrov.ru/userfiles/files/61966376179.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/3c3b01eb1dc845953720e2f750a9f7ca/sozebuxewig.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961a2071867---zaxujifipimexo.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/49060757649.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=calculo+tomo+2+larson+10+edicion+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119cd.bin
d42309438d3a5f64264bd1f7ab5b03285dc5ac33c5da71f973a028969756f02b
pdf-font-stream PDF embedded font (sfnt) at offset 0x119CD 19960 bytes
font_01_sfnt_off00014d56.bin
e75d90386e7afc91e430cf3f91386ee5c586644de995980f8d9c3539b134634e
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D56 11204 bytes
font_02_sfnt_off0001679f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1679F 16792 bytes