Malicious PDF — malware analysis report

Static analysis result for SHA-256 32d2623e4d655a8e…

MALICIOUS

PDF

87.3 KB Created: 2021-10-06 00:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 56a40e6f66b6e07a0200ba3a68ab3de8 SHA-1: 3cbe9a1477d56457b9d16579f288dd5f78e390f8 SHA-256: 32d2623e4d655a8ee02c4fb55d3bfdfc54c93ec869e1724707e4a9186692d4e7
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains embedded JavaScript and numerous external links, some pointing to compromised CMS uploads and others to raw IP addresses, indicating an attempt to redirect users to malicious sites. The presence of embedded JavaScript suggests it may be used to exploit vulnerabilities or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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 https://huntic.ru/uplcv?utm_term=sources+of+power+book+pdf PDF link annotation
    • http://pnlestari.com/visitbali/image/files/wolofijebubasuwumatub.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/kokanusomilufutizumakudig.pdfIn PDF document text
    • https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/5784548484.pdfIn PDF document text
    • http://chongros.com/userData/board/file/zejitawabafo.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/84369936053.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16154033c631e2---rusemowaxudapuxe.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/161559ea43765c---19717544471.pdfPDF link annotation
    • https://ashleymongolia.mn/uploads/files/2515002071.pdfIn PDF document text
    • http://jcnjl.com/userfiles/files/vifufunokebuxe.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/77546831537.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/rumaniviwonisivedinag.pdfIn PDF document text
    • http://zpkprzemysl.pl/ckfinder/userfiles/files/65236661958.pdfIn PDF document text
    • http://vetusmeter.com/images/upload/File/91322941935.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16143f51d6bee0---81269463151.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51323660190.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/gugomelagevagekadugig.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f99cef3928378b9eae87cdcced7ea644/reposobefemazivurud.pdfIn PDF document text
    • http://okna-stv.ru/userfiles/files/56692178120.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/kujabenufozenaralalexilip.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/44843122972.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/82192133390.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd45b012dd---26201769699.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/zopazirapubus.pdfIn PDF document text
    • http://ryyw.com/upload/files/2021/10/202110060527407123.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/rizopajegulavonelavuna.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9b80c14286492cf48401e516d2abbc54/dixoxewu.pdfIn PDF document text
    • 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_off0000f038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF038 10604 bytes
SHA-256: 87588550ab9db6d403f8e4ab649f0ce78ea9835d2946ca1345fb2b947736918d
font_01_sfnt_off00010865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10865 18116 bytes
SHA-256: 7287c42f32b608c6bade8650eee52b929c582b4b019bccfdc275c99d8bb2ef1b
font_02_sfnt_off0001377c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1377C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1