Malicious PDF — malware analysis report

Static analysis result for SHA-256 e022636d50bf54ca…

MALICIOUS

PDF

88.7 KB Created: 2021-07-16 12:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 50de14c26b826fb252111038f2f9065d SHA-1: d4283430e778cfcad2ce55d48985e1ed3006f8ba SHA-256: e022636d50bf54ca1645e9e97f227c6ad8c86666087eee13f0efcbf9e89a96f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing users to multiple websites, many of which are hosted on compromised CMS platforms and serve PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trekkingsapatours.com/upload/files/vamemelodudud.pdf
    • http://arch-teh.com/pic/userfile/jivifakib.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/e5956455a08a584d61fd1a42d3e8679d/26832976337.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec981ad9678---bazokikubibagobojomat.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cccc053bdf---15039683444.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/97d097b714ddb0aa67943dae7007f62c/wimavivuzivikabuwovejis.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/c5ea5da8cc367157ede270707e5657d1/tidoditavewamaxerewokab.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/29413cf7148895a8e073f69d208b053c/90719540041.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160838a6e0aa55---kalez.pdf
    • http://vanxuantravel.com/upload/files/wamilewibuz.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c409360103b---pegopaniz.pdf
    • http://elfuklid.cz/foto/Image/file/soxizetujuviximo.pdf
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/konujurupufun.pdf
    • http://bmsorganica.com/userfiles/file/36061982690.pdf
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/sojivoxuxide.pdf
    • http://berbun.com/user_img/file/16306275262.pdf
    • https://anthonygillant.com/userfiles/file/80097597489.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/84c463f8467bbedc669d017547ef6c22/63437560855.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/2d9da218defeda1191b249ed7875b839/83802137887.pdf
    • https://aquatrustfina.com/userfiles/file/69016032332.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16077ec468e887---84531624772.pdf
    • http://www.ks-zahnarztpraxis.de/upload/files/33207693181.pdf
    • https://thinkhigh-tech.com/d/files/67839552033.pdf
    • http://onsijsselstein.nl/userfiles/files/famevasom.pdf
    • http://plafondchauffant.fr//img/user/file/82899647017.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=supper+for+a+crowd
    • 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_off0000f7a3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A3 16792 bytes
font_01_sfnt_off00010fba.bin
b58694bd3f14d876916cd5ca7abe556fe23c892e20ecc8ef71b77b540a17297f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBA 10364 bytes
font_02_sfnt_off0001274e.bin
70175fc3116dc2a72a6ddbb6e8b75511233e84206467731c5597a53c9bfd45ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x1274E 17440 bytes