Malicious PDF — malware analysis report

Static analysis result for SHA-256 e99835ca1e262eef…

MALICIOUS

PDF

86.2 KB Created: 2021-07-02 22:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eb93a6d093e3fe8a6e58ae9f570faac1 SHA-1: 582918270c0dc6be2b326417976aaa2b198c2a48 SHA-256: e99835ca1e262eefcb534522d9880ffd1e5e1343d92ab930d3f5eb76cf03daf0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress installations and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to unsafe content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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://ailani.org/wp-content/plugins/super-forms/uploads/php/files/a0c0248b769610013a1ee5b4342729e0/34092356360.pdf
    • http://tubietelbar.hu/uploadfile/35128230961.pdf
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/75631e2a8ab1d4b9ccfd54709a7aa6e8/11340024489.pdf
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/69973934670.pdf
    • https://polandpools.com/contents//files/lemakapafivenugapas.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abd761a4971---84353668863.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160727e3458564---dagulinokowim.pdf
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/efb7e7599d6ad7ded1c0d2f09de1e049/22902493304.pdf
    • http://yjsyrj.com/userfiles/file/vobotebu.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093dafbe574d---gegarufuxufevat.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d9eeff479bc---11871924736.pdf
    • https://equator-maritime.com/userfiles/file/xowokuxovedejog.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607af43bbbdb9---mapujamosefi.pdf
    • https://schmitz.cz/res/file/vilakinesigikesoxupiferov.pdf
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/fe4a2300e2d654ff91098220207dbe89/25620707329.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e3886291b---sumejow.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16083099f8fd0b---37572346867.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cb9aadf44---59344165188.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/cdaf0c09271c95d88a80aa12378fb4da/26320416161.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/a111713eeb7ed09f61ef9dcb8d909ff3/22129349196.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/jm798grc04ok22daqrfnrjqhl7/waluwodukebum.pdf
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/drhrp87ong9kkibh983otvs3ir/13206164888.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0fcbb5fb18---319358003.pdf
    • http://dlt-nkp.com/fileupload//file/50520712433.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/4d558342cb9a244009a7fbc18da15007/99609398883.pdf
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/79086120105.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=power+trip+boomkitty
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca1c.bin
d10caf9dfa2f3c92a9befb413aa91c8a3cbf73f067047e4b904d766864442039		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1C 10368 bytes
font_01_sfnt_off0000e162.bin
885b9024a80bd539ee88f4c17c1e1fa3cc6dab475ff5b740ebf17c73a317c9ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE162 17112 bytes
font_02_sfnt_off0000fa48.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA48 16792 bytes
font_03_sfnt_off0001125a.bin
b56034ff69c7301d0e07fdcb846909fa9ba56735d73acd03ea343c5ae28a0055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1125A 22196 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.