Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66a4f78446ef1b1…

MALICIOUS

PDF

85.2 KB Created: 2021-03-17 11:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: bd1ac1de0cc2b9e78445f59dda64b322 SHA-1: 5a586ac1ef4635adbe6dcf4c5f905ce633f14d70 SHA-256: a66a4f78446ef1b17edb68fd3de85f4e7b9da4928cf5a772609e78fab5ce7beb
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicative of a link farm or SEO manipulation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/wix?keyword=new+york+2140+pdf+download PDF link annotation
    • https://buxufuniwa.weebly.com/uploads/1/3/4/7/134717035/5013991.pdfIn PDF document text
    • http://cenderaoriginator.com/serejusa819p.pdfIn PDF document text
    • http://pisodanijuke.iblogger.org/80606479282.pdfIn PDF document text
    • http://marketitaly.pro/silizovinupegejubozuxebu5dwbn.pdfIn PDF document text
    • https://pudoxarunisit.weebly.com/uploads/1/3/1/1/131164251/416803.pdfIn PDF document text
    • http://theplafond.xyz/alan_watts_youtube_lectureexmju.pdfIn PDF document text
    • http://monoga.space/what_does_don_juan_mean_in_slang7cfey.pdfIn PDF document text
    • https://dowanudamedi.weebly.com/uploads/1/3/1/3/131398164/kunajufipumitawepow.pdfIn PDF document text
    • https://ruzudewalaxuge.weebly.com/uploads/1/3/4/4/134497745/bekazivokunato.pdfIn PDF document text
    • https://sudejewakigalo.weebly.com/uploads/1/3/4/0/134040490/mirifuvigebel.pdfIn PDF document text
    • http://gemobaraza.iblogger.org/88858521519.pdfIn PDF document text
    • https://zolununib.weebly.com/uploads/1/3/0/7/130738801/814fd6.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/nujowi-fimoko-didofekosi.pdfIn PDF document text
    • http://mibenovapus.22web.org/capteur_de_mouvement_arduino.pdfIn PDF document text
    • https://bilunoxenaxu.weebly.com/uploads/1/3/4/4/134474733/gadudagoraramo_bawitefufo_mujiwibi.pdfIn PDF document text
    • https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/8243820.pdfIn PDF document text
    • https://gupexududoteg.weebly.com/uploads/1/3/5/3/135302954/dagudenupog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/dumik.pdfIn PDF document text
    • http://bamalupit.rf.gd/lubewajapudojavugu.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/zend_avesta_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/decking_sheet_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb5468b5-b4bb-4354-94bb-00bd79a692cc/french_past_tense_irregular_verbs_etre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b2dc85-222e-40e5-a746-6b472dffad0b/factorytalk_view_client_configuration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/212e4a05-744c-4c56-a61e-47bfb5aae4c5/trimble_writing_with_style.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/appsync_android_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/9131023185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4996dd31-931b-4ce8-8059-5aa1ea6ce8e3/33113563795.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/kugusumome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb0044a-9bbe-424b-bc27-3af97ca34445/19144020210.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://scripts.sil.org/OFLIn 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_off0000f81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81C 5496 bytes
SHA-256: 6d32026b8dddeeace7c2a025c64a6b7d9170546b949651a05a8de183418558f6
font_01_sfnt_off00010b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0E 10824 bytes
SHA-256: 78073f0f4ccc11314f1b502ac61b91b89b1d1fa1c4f6df13fac14d2e61bb1fe1
font_02_sfnt_off00012f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7C 16372 bytes
SHA-256: cf0ad4ad4c91154c1f5bd2331a08851daf404e4a43ee4fcb746ef38176224bf3

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