Malicious PDF — malware analysis report

Static analysis result for SHA-256 494e6dbe1db2dfcd…

MALICIOUS

PDF

87.0 KB Created: 2021-07-03 01:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06b37d621fdf3383d0521c5371a15119 SHA-1: 60b92497473e39fb52fe17e6c1580212bff95f21 SHA-256: 494e6dbe1db2dfcde842fdc16d72f7bd57d3af63b5945c79e435bfe05b04febd
156 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on multiple disposable domains, a common technique for distributing malicious content. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of numerous links to potentially compromised CMS upload directories and disposable hosting indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://alexanderjamesbackcatalogue.com/userfiles/file/favevo.pdf
    • http://mdbim.pl/ubezpiecz/obrazy/file/12461896510.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4e743b9fa---ravugusoka.pdf
    • http://adveotec.com/img/file/xufoforezitibikumet.pdf
    • https://detectiveoffice.net/userfiles/file/petudeguxodolo.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/f6beb15943715f53c11d3acf8b17f8e5/6534424644.pdf
    • http://garderoba.sk/images/_file/sodeboxadepujumijuru.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a2aa031f0---komegukavoz.pdf
    • http://sattamatkapatti.com/userfiles/file/deradadumaja.pdf
    • https://lasanisports.com/files/guxotot.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a40997c9fa---sajexegepamixumipa.pdf
    • https://avonsteel.com/UserFiles/file/susib.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/ecad6ccfa3b0ed95004b8023bcd29f0c/sobolisimonex.pdf
    • https://myparrotfood.com/user_files/files/babexepajeg.pdf
    • https://bangprice.combangprice.com/beta/cms_image/file/gikugatupu.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a37a9d0723d---bipivuwadirub.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608774ea205aa---suwesoxuwikomoxukito.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607cee3eb7e08---76151488962.pdf
    • http://goldenpeak.it/userfiles/files/67038467405.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867a01bbe93---21949244581.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c7b842d46bf---xuwaga.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/872d38d8b5fe874aa99cfd97ce124dad/42357782267.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/dc1f10e9d62860e4376b4429ec90855b/4508847479.pdf
    • http://candientushinko.com/images/file/korudubegebawes.pdf
    • http://ajtoablakcentrum.com/_user/file/gosobezubulevikefi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=made+up+places+names
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f27f.bin
d6439ef55e2e0c64d66301df1e45cb49c0adbe890f2183f7cab703e110e1dfa2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF27F 17556 bytes
font_01_sfnt_off00011f3e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3E 16792 bytes
font_02_sfnt_off00013755.bin
4f07bea433e11232201b99d6457501912ab403e82b17e1f01b1167f0587527ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x13755 10356 bytes