Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d63f295f1683b3…

MALICIOUS

PDF

69.2 KB Created: 2021-10-02 11:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5ba51c547cdc8271d224bfdc666c3ad9 SHA-1: f55ae0173b1e7dd01ddef3f1092c2c560d87d0b9 SHA-256: f2d63f295f1683b3dd5518b27003f61aef4b57e37c5896ffd7d7154cabeae3bc
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious due to its structure and embedded content, which strongly suggests a phishing attempt. The document contains a large number of external links, many pointing to compromised WordPress sites, and is designed as an image-only lure to trick users into clicking through. The presence of embedded JavaScript further indicates malicious intent, likely to facilitate the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://nomylo.ru/uplcv?utm_term=apa+format+for+word+document PDF link annotation
    • http://forma8.kz/ckfinder/userfiles/files/mokafuporoxuf.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/5001102940.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137b4b535b4a---lekinatifomujerurugakuko.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/76999203060.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/40975a370e38c3efb471d726eaa6a488/wugululopadelirujipenaf.pdfIn PDF document text
    • https://maria-galland.ru/files/file/todidokozomatibajavi.pdfIn PDF document text
    • https://undergroundtakeout.com/userfiles/file/98249925722.pdfIn PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/14674489518.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1613cbc00491ce---72636130748.pdfIn PDF document text
    • http://skkl.cn/filespath/files/20210927155724.pdfIn PDF document text
    • http://eco-building.cz/UserFiles/File/sawanowuniwap.pdfIn PDF document text
    • http://icareonline.net.au/ckfinder/icare/files/85853380007.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/3314426976.pdfIn PDF document text
    • https://krusomying.com/data/file/pisiw.pdfIn PDF document text
    • https://heureka-cz.eu/files/39588791386.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614bc0fe908b1---dedenu.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/87328755609.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ad5884328c---sukerokezem.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/fizetigexadalubef.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/gavogewezigetabesop.pdfIn PDF document text
    • http://trungtamsangloc.vn/uploads/ck_upload/files/mozinidatus.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/vijusezalogef.pdfIn PDF document text
    • https://parkerboat.hu/js/ckfinder/userfiles/files/34175244658.pdfIn PDF document text
    • http://ageddfjtj.pretty-match.com/upload/files/23016648755.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_off0000b23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB23E 14412 bytes
SHA-256: 7e3b16d99f7933e4255998f531ee7bedd9ffa93f9bc504357cfecdb1e4083e3e
font_01_sfnt_off0000d64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE61 10644 bytes
SHA-256: 4bb72cbbfbbccb2388dca05b5c8a602502a08776cf73338f579455e917faf120

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