Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62eeebc3dadae29…

MALICIOUS

PDF

85.4 KB Created: 2021-06-26 17:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 28063d3efa78fd1cb447dd3336821e22 SHA-1: 14f86ba05a95786c80ee4a9b96626854587baff8 SHA-256: a62eeebc3dadae29fb9fbf4dc9995583dcc735612e0f7c6e03ea4cdf60d5c394
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://tecnibat.net/uploads/archivos/xazifosujedumizomedenat.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfbdc1609f---51159816460.pdf
    • http://zrdb-drogbud.pl/Upload/file/xobabujexaz.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882b4534d18---dijejapiferosipatanix.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/onv1irun70ap78im73t13g4417/53379852426.pdf
    • http://auto-spec.ca/fck/file/joxevulol.pdf
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/mivito.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9c63f3867---99452262911.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/5f7b8afd63f0238b6207ea7a45a7923e/sujakamikogopajadogerifug.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f847081ff4---vimararudoguborekovidejix.pdf
    • http://akicgiyim.com/userfiles/file/86701997004.pdf
    • http://teerosy.com/ipp/images/uploads/files/66427639835.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/8d838145046e64c1e014a1c4d9227490/71491554478.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf2c5c023f---pipigexepodofofonesunixe.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4b64793fe1d7b31731e712a31bc8ab44/sugasuvebeborikigazifewe.pdf
    • http://dj-venci.com/uploads/pages/files/mazupebadositezi.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/887ff608731a8e200cd41940379048fb/87928500801.pdf
    • http://jiuxingchaoshi.com/uploads/file/072056025203.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/491a80a1f24f9925bbc2955d745bc408/95457621061.pdf
    • https://hanahana.vn/media/ftp/file/texivilawuz.pdf
    • https://hospvetcentral.pt/site/upload/file/veluta.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc87a79905---digabowuzij.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=does+osmosis+require+energy
    • 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_off0000eb87.bin
9fecd99b18c6d96598203a829a175dc94e4d3c0811bd8d3d3667a83d09ec629d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB87 16832 bytes
font_01_sfnt_off00011770.bin
9e5641aefe519751c5cd375c67e3b8e639403dcebaea3c3c4103d7e2b2072f2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11770 10508 bytes
font_02_sfnt_off00012eff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EFF 16792 bytes