Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e63769b39cdfd4a…

MALICIOUS

PDF

70.6 KB Created: 2021-09-01 06:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 527c0a314a979514037e2052a6ed6582 SHA-1: 151492f4d81427723c07bd64b851b80e9c102c78 SHA-256: 2e63769b39cdfd4afa454fa287cd3e3e70bc7f6840d051bf782371dd89e572e6
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as containing a link farm pointing to compromised WordPress sites. The ML classifier and ClamAV also identified it as malicious. The presence of numerous URLs hosted on potentially compromised domains suggests an attempt to redirect users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609c391b14c18---mojuf.pdf In PDF document text
    • https://planet-for-events.de/userfiles/file/vabolakodakifopafeloxodo.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607468f664027---39219190067.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/libefunuzetefafazozadave.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160769ac09d8f3---titaxiw.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/zikorupupimex.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607524d66a8ce---lebitod.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5093bd6e5f---17123162694.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/kebojulegotulenigezijo.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/67216147703.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/u0isgv8cv6nvo1i179374tan7g/totusikevibez.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/2vip12jci60d1e4e80j24ivnp5/21547465550.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/5382876bd190f2d9ccbe799805e2c846/7610840161.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c41a3fe2004---matogolepab.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/142101342147.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/5398904741.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/ridikeme.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/dobinenarago.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/pawafopoduja.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/16777022316.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16095ffaaae4fd---66375414799.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/54562488603.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/2ff9e3dd359d4344e2a370aeb195b88a/bonumonujumamodoxa.pdfIn PDF document text
    • http://70sromans.com/clients/871711/File/vaken.pdfIn PDF document text
    • https://desense.eu/uploads/wysiwyg/files/88934842065.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/dasimejuxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+get+iphone+in+freePDF 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_off0000b7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC3 10340 bytes
SHA-256: dc2fc16d51bc66a74aca9ec8624d36e089fb5d9091656d56b7aa59ab41e5d689
font_02_sfnt_off0000e707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE707 14944 bytes
SHA-256: bd66ca93e07707db87343ed8af77a765a93bcc568446bf71793d8981c6dbc5df

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