Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ed510bbd16229b…

MALICIOUS

PDF

70.6 KB Created: 2021-09-08 10:12:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cebacf8c3ea3d59f2315d0f03ac2a099 SHA-1: 655d44ab4efd6d034c60cb9cca5f007b4e6452cc SHA-256: d7ed510bbd16229bb7351a39c96f607a939956d6af911f73e773a46cef55e349
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code. It also features a link farm pointing to multiple disposable hosting domains, indicating an attempt to obscure the final malicious destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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 http://austria-ex.com/images/blog//file/30940274987.pdf In PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ca76831fb---rekamijegezisuruvan.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/11276071864.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/63905792197.pdfIn PDF document text
    • http://foodchemsino.com/d/files/jugotenelugijizini.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/94563502660.pdfIn PDF document text
    • http://myjacksonfamilyreunion.com/clients/e/e2/e2167ce47089e9b789d53270b7cccc99/File/8103850898.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/vogebojulefuxivakeno.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/renovamipufodazesapito.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/323dc1502ee107bfea81edf11d2bf0d5/kulozaligajasavulodisidin.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ll8n2b467q4hl3std16qgg7150/48508999047.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/kemavesiwu.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/24678877443.pdfIn PDF document text
    • https://hoavily.com/uploads/files/59009286686.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/dejer.pdfIn PDF document text
    • http://retrolondontees.com/userfiles/file/43826042300.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/cc922cdde71d556ee3e5841c7008a698/mesikijalemulavogorerop.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160833479c0d71---xujokudepekofewo.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb5d5e3910---sipoj.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/widobarujubewitisig.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/xojiduzuxamabule.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/losc2mhoucd364t615v9skj7p0/fexawedubepatipavazemogeb.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/03f97d9b54e1c13124a8660c382e3cb7/72893189845.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/kufubetav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=ucmj+court+martial+manualPDF link annotation
    • 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_off0000b484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB484 10328 bytes
SHA-256: 2a021e1915231015215c45bd268213e4041228367b63f4eabd2ac501a8019283
font_01_sfnt_off0000cbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB3 16324 bytes
SHA-256: 367700c143f7026d65fb49670668082d94b10c396d77934c8b91ae18247fd03f
font_02_sfnt_off0000f509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF509 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1