Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe46ae32b72ae0a…

MALICIOUS

PDF

89.8 KB Created: 2021-09-04 19:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3b664ca023657b3d3628735d453edfb5 SHA-1: 783cda0de1924522120de1c5e8ee7fc98ab39ac5 SHA-256: 5fe46ae32b72ae0aafff277db7d91b606b43c79befeb2f1600aca9688b3e4248
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The embedded URLs and the PDF's structure suggest it's designed to lure users to external sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://wastran.ru/uplcv?utm_term=mitsubishi+outlander+2014+repair+manual PDF link annotation
    • http://abwingsbuffalo.com/uploads/files/50607429969.pdfIn PDF document text
    • https://t2sc.me/userfiles/60441849322.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/rlc0qp7vjt9h4nflblg9f8l9iu/sopilosozigunemurikub.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/zunejij.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/51462700823.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bda42c9feef---gukekozowixisozozat.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/miwatizekonemarevexilo.pdfIn PDF document text
    • http://rowsontw.com/shopadmin/upload/files/43349632188.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1610a0797d35ce---4359374222.pdfIn PDF document text
    • https://greffedecheveux.center/upload/ckfinder/files/52975580551.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/91416565329.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da657aa9b6---33828760103.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/bezabiwivenalubu.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/fcece2b75189d639fed7bb55c0ea51ef/wolixaxezezus.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/4brcjpt16meuvlj0i54ielnee6/7080438305.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16070a2733bbeb---23386243159.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607f86bf61f3d---61826863122.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/vexozabavubesepuresij.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/6268032892.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/39685357415.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/36892383686.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/3314078049.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/7629916420.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_off0000f81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81F 18092 bytes
SHA-256: 9a8df286bd8d81f7bc8eeca56128555ff5b9d2b20cb88233bb2c84e6f078c041
font_01_sfnt_off000126f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F2 11264 bytes
SHA-256: 8a92dd3d63fd5b06b69d942498e05e54f6950d44c4c7d4d8865478a4ccf899e9
font_02_sfnt_off0001410e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1410E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1