Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb6fdf5708760d3…

MALICIOUS

PDF

69.7 KB Created: 2021-09-25 12:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f865081a2891eeb3819dc9a5fc6d2656 SHA-1: e5b0fafcf56017828cff3cbbfbc81d6ae9adadeb SHA-256: ecb6fdf5708760d3b568fe523026f6625f0103dea7cd992572fabadfa87cf88d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, directing users to various websites, some hosted on compromised CMS platforms and disposable domains, under the guise of providing download links for content like movies. The embedded URLs suggest an attempt to direct users to malicious or potentially unwanted content, likely for financial gain or further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://irlanc.ru/uplcv?utm_term=charlie+full+movie+download+torrent PDF link annotation
    • http://sedaciesupravy.sk/media/file/laponosoxanakujitapim.pdfIn PDF document text
    • http://rhoptik.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/bipazudonoru.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/relonaroxenusenipojasike.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/69040855868.pdfIn PDF document text
    • https://vleek.com/uploads/files/59367455393.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/bekiziwoxebozefudutaxik.pdfIn PDF document text
    • https://endeligmandag.no/e-brev/data/div/fagorak.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/e768051aa7ae8cf9a1b415d1236f87ac/60603736315.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/mewofareveraduzaxoxupokis.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/tmc4a3au8nn49snm9u6amlodni/sunirokuvovoxepivijikaku.pdfIn PDF document text
    • https://monyetjoget.com/contents/files/kusujisafadovuwara.pdfIn PDF document text
    • https://csodamalom.hu/files/files/14094342668.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/kopaxifu.pdfIn PDF document text
    • https://j26clean.com/upload/files/votiki.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/rapofexosiwixose.pdfIn PDF document text
    • http://kondicionery-pushkino.ru/upload_picture/file/jogudesoxabowabaj.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/64152864346.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/17622623404.pdfIn PDF document text
    • http://tykhchem.com/upload/files/xokazatowuvukakobelo.pdfIn PDF document text
    • http://dgkno.cn/upload/rogukovabosokaw.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/18089724526.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210907173500.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/161419d7659e7e---toxujamulefunigexori.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/26574759135.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/57750071228.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_off0000b2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E5 14372 bytes
SHA-256: a7baa26abbee71748b5773ab744580fe4ff06bbe1f6901df0a169313b1e22a51
font_01_sfnt_off0000d684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD684 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 10736 bytes
SHA-256: 41ab43b3ed2ca06535529dfe82bcb1737ea4052c6bb8427b5e9c12e93e0a00ab

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