Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2f5f0f1e8ad76b…

MALICIOUS

PDF

82.8 KB Created: 2021-09-02 08:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 47d79129fa5d7609ecc30ccc36b6fc48 SHA-1: 43baba838191a8cf5028e625442dd7def0ff6e35 SHA-256: 1c2f5f0f1e8ad76b52f7f182a5cdbdfce63c2391714f789e2cc14280a4eddb2f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=which+branch+is+the+most+powerful PDF link annotation
    • http://shopcloud.cloud//ckfinder/userfiles/files/45172467323.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/15288854628.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/dbd6682a175c7796dbae49eb3e342f8b/86573435056.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a908478a8d2---lanowefezegipeb.pdfIn PDF document text
    • http://dopuskvsro.ru/UserFiles/35773164067.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/geduxadin.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/h7f0s4d55vp5om3ta17f02mga6/xitadufimopikorisux.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/9d6ba93965fb686cad22cea25948d248/34641966161.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/49252137064.pdfIn PDF document text
    • http://atek-ent.com/upload/file/wopozewilejoxipuso.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/45031046318.pdfIn PDF document text
    • http://chineseclothingonline.net/File/80694230116.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f1ed26556---tilulaxobokalevogevemuro.pdfIn PDF document text
    • http://jhdljz.com/userfiles/file/1624489968.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12c1e77bea---93400472294.pdfIn PDF document text
    • http://www.me.ntou.edu.tw/ckfinder/userfiles/files/20210718_022629.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210901030437.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/eefbe1fd2d6042f26e73889c8e4d17b0/xeberabelomo.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079357a26a1b---jorotu.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/jezusubiwevej.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a3d62d75a---88044527459.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/mojovopuwubefik.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/4415e01cd2be73fef754fdba2ce86ebf/13355106589.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/161261182b96f5---fedovupifivudu.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_off0000dd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD45 11064 bytes
SHA-256: 2e3658a8401619d97bb28728b5657e766813b37f846627c3047920c5f96762c5
font_01_sfnt_off0000f6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B8 17952 bytes
SHA-256: dacf1aaa8c3ea6b3632e932f25d4b50e65f827a9e1dc504ecd612c6d1cda39e8
font_02_sfnt_off0001251b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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