Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe47a97023d46227…

MALICIOUS

PDF

81.9 KB Created: 2021-09-19 18:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2e7a164f55bc11be758fae75e50af5e8 SHA-1: 3cf5e263be91525cc9ed7f3879e443dfcb7fc09a SHA-256: fe47a97023d462275f40dcb76359a173432576cee5cd4415bb7070a116490f7c
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, containing numerous external URIs pointing to various domains. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://cructi.ru/uplcv?utm_term=can+you+lie+a+refrigerator+down PDF link annotation
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d074f069e---ruduwinerusemexirobofawes.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1631488279.pdfIn PDF document text
    • https://hgqq.hk/tony/churchofgod/ckfinder/userfiles/files/jagig.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613e50bd9a33d---14851967485.pdfIn PDF document text
    • https://senegal4d.com/contents/files/zuzuzegelitilumunekagutez.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/90233854366.pdfIn PDF document text
    • http://a-b-i-s.net/layout/bilder/file/vawin.pdfIn PDF document text
    • https://korzo-galeria.hu/files/file/gemapativemufu.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/53326733594.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xafunazozepojixodojab.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/86737072163.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/56731889206.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/161310e8dbcacb---jurojov.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161345be67d407---pujeduk.pdfIn PDF document text
    • http://st-communications.com/ckfinder/userfiles/files/55307846001.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/wamoroj.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/39419560148.pdfIn PDF document text
    • http://naszemotyle.natura2000.pl/imgturysta/files/pemamofilibek.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/wodexomaziz.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109130633002932.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/96844534657.pdfIn PDF document text
    • http://freeorden.com/media/file/nimabijeparogiwegikabijex.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/nuwijavofuni.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/18553270265.pdfIn PDF document text
    • https://sanagustin.cl/files/togola.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161440368c190d---93161558540.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_off0000d989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD989 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19B 18756 bytes
SHA-256: 5c23c39a560e9c345c4e4f49bd09db0bad136a0f7fb52a3e48741bcef7ccfdbf
font_02_sfnt_off00012181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12181 10692 bytes
SHA-256: f1ad10df5770920c6c8fe2e8c8eaf4eb00c15b7fcf9ef8a0c57e54f254bad668

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