Malicious PDF — malware analysis report

Static analysis result for SHA-256 2469ff21fec7d0d6…

MALICIOUS

PDF

84.6 KB Created: 2021-08-10 02:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f989ef98f6c75864a10bd9ff1fb22a7c SHA-1: 166dd565f88229b504369a1d3e6040b19a3484ce SHA-256: 2469ff21fec7d0d613160d180a6c43c0e7f682c40ddd794a6416d603da86c1d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm with numerous URLs, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or downloads. The presence of external URIs and link farms points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://krisoc.ru/uplcv?utm_term=bittorrent+pro+for+android+free+download PDF link annotation
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ms59m6kf1bvf5c2hqac22c7er5/ninibeja.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/43364685744.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/jovemolufaxitowovovos.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/c28014b00fd6212060346ccbf4ee7292/10293725832.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/05aa9c84b1e962ae0d6ab4ee02b231d2/bijinifatovuzobifib.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/kenuzivojeromefaxa.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03c5581f4a---89814906920.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/58746991200.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/pegomevamaboba.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d97e0ae4137---63592077572.pdfIn PDF document text
    • http://saokienviet.com/uploads/image/files/19709180217.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/saragukewasusafirawubop.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/8926137203.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a2233183e74---xakavarabevubosure.pdfIn PDF document text
    • http://pokwuttibut.com/file_media/file_image/file/lisozekakuvoxezuzuges.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210526075414_yklip1.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/lutagudatetezor.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/91898331791.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/cda5eb11ccf1b7580c2e53cec08a461d/94537237253.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/eaf76082253877dea08cab583b036ebf/kixononozadawogozekez.pdfIn PDF document text
    • 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_off0000e7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BA 10460 bytes
SHA-256: 0694c8c2ef7dda17f4f54e9b72f9a2c5337888860654b3c723bad3d54a82bfb9
font_01_sfnt_off0000ffa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA2 17456 bytes
SHA-256: 1a5ea7472858c276d559e00091041fab442d0eb4d8310721f0b0a9083db9802c
font_02_sfnt_off00012cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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