Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b1506241de6121…

MALICIOUS

PDF

86.2 KB Created: 2021-06-25 23:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8563349d13f6edc5160fc76167ff80b4 SHA-1: 9844797b646ed2f587d597ec8e53c6932124b181 SHA-256: 13b1506241de612150d7fc9d816a21cb4d7c983f819a58f0fe5c6d885f88c833
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting sites. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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://driver-jazda.pl/upload/file/tovifokagimarevanolakes.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160767e183d5d3---pekuxuvabuga.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fd764c683---biwazoxon.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/cf3c89256c29ade77f8d08a671ef011a/89851484104.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/573bac78c9f22fd0172131c409961067/34328551549.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/0e8d3a9eb1b88482e3a3542869af6f00/46450092459.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f66bf5337c---10277327843.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e842d84946---5472057074.pdf
    • http://kasargod.net/uploads/file/fawotalotusexivozep.pdf
    • https://canionglobal.com/FCKeditor/file/fajakovudaxaro.pdf
    • http://thevisionkharj.com/userfiles/files/kegigorewogewejixiju.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c608020c8---20851809452.pdf
    • https://assignmentmart.com/ckfinder/userfiles/files/67437772514.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/83c2448e4aa3a93f89bc24212b1f754b/gexumuwuwipibuseludufo.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/e8cob2rov0kj5sol72gn80236r/99451703603.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/171b6239524dc8fb41f18a0f036561d9/gefidivebex.pdf
    • https://poolpoint.be/uploads/file/kosukukiduf.pdf
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160905afdb51ec---nerajegirot.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a182994b8d7---luzakevimefazipo.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/adbee8b447ac5c9dc5d3ad8a59fc3c74/ropekufubumebub.pdf
    • http://acril.ru/ufiles/files/jenipupegotolaxesaji.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/c145611aac88ca1e133141c1ec109eec/notowofowafoti.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608246d7c367f---58055391689.pdf
    • http://upsshop.ru/ckfinder/userfiles/files/14770893578.pdf
    • https://samngaimarble.com/html_upload/file/96842709087.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/9841a0c0b53e61523a2293c00efb2065/pasutiponodekebetifiju.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=mosfet+full+meaning
    • 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_off0000e6cd.bin
b4ec329cec29c7bf51a676fe9d76cf480de15bd6f610edbb1539c9f053608c56
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 10548 bytes
font_01_sfnt_off0000fee1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE1 16792 bytes
font_02_sfnt_off000116f3.bin
20b1f4ebcab5570e318823926ccd959efaf8abd781cf91ad7f2b8876fa023200
pdf-font-stream PDF embedded font (sfnt) at offset 0x116F3 20232 bytes