Malicious PDF — malware analysis report

Static analysis result for SHA-256 c772188fac1893ec…

MALICIOUS

PDF

93.1 KB Created: 2021-03-27 15:23:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc0c6393460faf1e2ba7e6227791b8e3 SHA-1: 22b289064de48744867d0ac45b22ff303cd34202 SHA-256: c772188fac1893ec8eb79387c0b94b98d288357d333205ff8714ae2679b1add1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution attempt. The PDF contains a large number of external links, many pointing to Weebly and other hosting services, suggesting a link farm or redirection mechanism. The embedded URLs and the PDF's structure strongly suggest it is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/wix?keyword=brother+sewing+machine+manual+pdf
    • https://cdn-cms.f-static.net/uploads/4469824/normal_6035732e5cf49.pdf
    • https://nikakakuko.weebly.com/uploads/1/3/1/8/131871571/eda3c1b.pdf
    • http://blog-millionaire.buzz/regal_academy_fairy_tale_pop_20hobh.pdf
    • https://maritomumotoko.weebly.com/uploads/1/3/4/5/134512683/9754de6.pdf
    • https://nogikukejigili.weebly.com/uploads/1/3/0/8/130873965/mozurosukofo-sajemameduda.pdf
    • https://static.s123-cdn-static.com/uploads/4501501/normal_5fdf92f25dbd7.pdf
    • https://cdn.sqhk.co/vejuwipem/Lgg1Fwj/galaxy_parallax_live_wallpaper_hd.pdf
    • https://cdn.sqhk.co/jukunobegabe/LibvgiA/doxepemelonafiromukituz.pdf
    • https://bevotiwi.weebly.com/uploads/1/3/1/4/131437753/jusifefijazor_pisekojibulisod.pdf
    • https://jitavemalidev.weebly.com/uploads/1/3/1/8/131871699/zapigu.pdf
    • https://tanedozuwo.weebly.com/uploads/1/3/4/6/134644204/sutifetulomimamam.pdf
    • http://appletopshop.ru/nimiperajolulalu318qc.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/mutixozewilepi.pdf
    • https://negofajosodin.weebly.com/uploads/1/3/5/3/135314147/fitedebutupulej.pdf
    • https://pojixaguwor.weebly.com/uploads/1/3/1/4/131453565/rirukubejidavip.pdf
    • http://oneplusonemain.xyz/956109802654t4g.pdf
    • http://sokolov.fun/mars_hill_university_football_scoredfp0j.pdf
    • https://bizonununifewe.weebly.com/uploads/1/3/4/7/134773553/kevugogo_saroniwut_godiwilalokezik.pdf
    • https://static.s123-cdn-static.com/uploads/4472475/normal_5febc2025ac11.pdf
    • https://cdn-cms.f-static.net/uploads/4495707/normal_601a3d370ea24.pdf
    • https://cdn-cms.f-static.net/uploads/4465007/normal_60111f3612364.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b1eeb2ae-b144-4038-bc93-72c087814d9d/voxubekatogopazemixuzud.pdf
    • https://uploads.strikinglycdn.com/files/16edd9a8-3e1b-4268-ae04-61de21445941/82032462522.pdf
    • https://uploads.strikinglycdn.com/files/d7530e28-9c46-4740-b997-0324bcd103ee/polaris_360_pool_cleaner_manual.pdf
    • https://uploads.strikinglycdn.com/files/09459ec9-d607-4ba6-aa24-3cc431fca7d8/2007_american_buffalo_gold_coin_value.pdf
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d9d.bin
d55ba12b9b184266847e36661c4eb18b2e5a0126a5ab404cfef3f513e38c19e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9D 5712 bytes
font_01_sfnt_off000140f7.bin
7b04f2e9ace7d18f8fcb28e8fd3599c722325272486df288b39481cf7d9e6b03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140F7 11132 bytes

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