Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea6c6ab5da434f9…

MALICIOUS

PDF

90.5 KB Created: 2021-07-05 06:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b7a3c5b93aeba9b9cc0b9d70b09dcdd7 SHA-1: dc99dc105e26f96e78186ae4c528f2a7f5d0e150 SHA-256: aea6c6ab5da434f992385fb462fa1ba4725ad36c9a9f1b537b2e132a2f3341f5
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_MFA_LURE' heuristic strongly suggests the document is designed for credential harvesting, specifically targeting multi-factor authentication or one-time codes. Numerous URLs pointing to compromised WordPress sites and disposable hosting further support its role as a phishing lure, likely leading to credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://smidgel.ru/uplcv?utm_term=adding+%26+subtracting+negative+fractions
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160834162a5376---doxivuwufuvolusexo.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/9099fc522b6ec621fa1039657b162edc/zilir.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7742bd4bab---denerekajodilosorufilobap.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a136f3acd63---3575023028.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba35644d5ce---vaminiranofoba.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/f66adf2db6583b635a0ad11c1a92da07/newofakuzejuxoni.pdf
    • http://157.230.241.115/image/upload/File/16528301024.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/7bb9ef6be7516fad92524fc3cbbc4711/zininojulavekabofi.pdf
    • http://askort.pl/Upload/file/kipusitexikaf.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/nixani.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/cb099621c3d8e86442d37f9494438ec4/mobubupozutezipejiwi.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/stjaqpfk141sk94nanrv5ojp50/54405152816.pdf
    • http://lasfyy.com/uploadfile/file/20210603220334035.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160a33fd4ee5bf---30406650775.pdf
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/fuxamakos.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/09cca736b210875cebba0390cbcff4d5/zibidexevibijaporemeweve.pdf
    • http://iphysiology.ru/upload/sukexazivoneruluwire.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff7c29efd9---8529589831.pdf
    • https://gwynharmon.com/home/gwyn/public_html/ckfinder/userfiles/files/40473958930.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88f314858e.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/mn5cpecmvrgvq4segdt9tbuk4m/79055877844.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/5fb4be67f13bfe0be16d9c494daab260/38648694905.pdf
    • https://aljazeerahpetroleum.ae/userfiles/files/siguvobomimuna.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9f61a313d---pepawinasopibimumir.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160761699876d9---61061895819.pdf
    • http://jingluo.net/uploadfiles/files/5807209489.pdf
    • 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_off000105ae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105AE 16792 bytes
font_01_sfnt_off00011dc0.bin
01c7e153fca436b45a585acc6a35efe1c09019938113ef0a58763d0ff26fab51
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC0 16524 bytes
font_02_sfnt_off00014893.bin
6a87a76eae0e94adc90861a170471c08b137e55da0cd40f728d3915e6ec15b35
pdf-font-stream PDF embedded font (sfnt) at offset 0x14893 9572 bytes