Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee1f773fae8db60…

MALICIOUS

PDF

94.2 KB Created: 2021-07-04 01:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b0c2533240cbb275c6951d1d23a607c9 SHA-1: 3145dd5b3880e1642e0133b9b6d3e698c2b50a61 SHA-256: 1ee1f773fae8db60b4eef0624911fcceb4cfc27ddf4a2d6fe1d64714e43ee94d
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, containing language related to lotteries, prizes, and parcel deliveries. It also functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://isleo.com/i_photos/file/28602697353.pdf
    • http://debandhelder.nl/ckfinder/userfiles/files/sagasisapunenanevumubuju.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab312afe8c---15130476746.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/41699511983.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7b81d8443---20722804761.pdf
    • https://karapinarinsaat.net/userfiles/upload/file/48165361258.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16084d9aa93413---26497192095.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/lifa6jc9vs6e0ok9corsg4dro5/pedexokisofejafovi.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/8aa13cd75d212c6e2d2140ed8cf5f40d/raweguvodikil.pdf
    • https://aterhesseg.com/up_image/file/42390323850.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/2apcrqk664ut1l349q5tioh988/8189452364.pdf
    • http://busangh.com/attfile/fckimg/file///2021070120126_743145022.pdf
    • http://thermogroup.ru/uploads/files/letuveb.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160be60b36c76b---21435918423.pdf
    • http://tantex.org/tantex/tantexuserfiles/file/29660583491.pdf
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/40788761453.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b3990088bfe---vonamuto.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b64701b66---gavijojo.pdf
    • http://catgarner.com/clients/873270/File/kinofelebegevemusetafison.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/65c98d31ce8056c253dd189fb0b00619/34596601337.pdf
    • http://malbreil.com/userfiles/file/nebovabuzifixovig.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/69427729060.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608aac98c3187---88259829428.pdf
    • http://cymrozgreatdanes.com/clients/1/1a/1a407d8ccac5525c71aaafb6b4664123/File/49803418497.pdf
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/bevotevevov.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0278e0d785---83642501978.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=convenience+store+meaning
    • 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_off00010ac6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC6 16792 bytes
font_01_sfnt_off000122dd.bin
bc5bfa56d09b1d4089563b665c1e372c7f4692c9e36713e2052e697660cf5e07
pdf-font-stream PDF embedded font (sfnt) at offset 0x122DD 10624 bytes
font_02_sfnt_off00013b40.bin
f4f9e37b6a7c5645d6f6d106303054fd3b32869147b1464abf61c6072f7fed84
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B40 18140 bytes