Malicious PDF — malware analysis report

Static analysis result for SHA-256 677754576e95aaef…

MALICIOUS

PDF

85.3 KB Created: 2021-07-01 15:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fe3e6e906af0bb24b7d918a36c7d7468 SHA-1: c88acac9848ed95ff856745dbca939ea975deb04 SHA-256: 677754576e95aaef6302f094fda263ea658fcd4ae50dd6693eb04cbaa4173513
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution lure. The document body is heavily obfuscated, preventing analysis of specific content, but the overall structure and URL targets are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608a29e663e29---sowimasisezasafezusure.pdf In PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/3a63453b87cb96a947a437669dd70e78/77831454854.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/4b3ig6ngvrrgpijl1sriovn57f/14109952600.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/lrd28j6898g20q6ueiuvho5en4/tiwogigonudo.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac37e1719a9---dorab.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/df726669230050d5ef5aa8ffb41d10c8/sipexafubajumepukubavi.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/1g456s2ql8ru68l87p5fc9e0ic/6821022546.pdfIn PDF document text
    • http://adveotec.com/img/file/wabedeseduxenesonifu.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/19f782cb663e5121d592d0fc4270865c/mexinerojukodefabugiru.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0ca67da75---48869023964.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/614a60637730f8421aef72247f57efe3/60475865502.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/kefumebamigixezalif.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/nomlpsssnq99gdngjgm747qgh3/19330978948.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a4307e360---safisewodeb.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/c2v4os2o6sdasg8cu1qiqrtbv0/kezujovabidugatinijez.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/jemedenadi.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/a7497b59c2559a8ecb8a2b337b173d5b/51932634457.pdfIn PDF document text
    • https://area5srl.it/file/vipunogizowovitusu.pdfIn PDF document text
    • http://sanmarinreunion.com/clients/c/c0/c0747301521b2fcd71a0106c9132c7e7/File/29130332999.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/40d4deeca9e363f77666a888f6d85571/sobizudomotowasidapuxol.pdfIn PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/16747939615.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/7cfbcd57d9a6992a4c029c019a2d4c0d/jojatuvevigukonazalaveru.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/sigiliniz.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/vajivugen.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608568f6b63a0---nigawi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=in+some+respectPDF link annotation
    • 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_off0000e16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16D 10188 bytes
SHA-256: d179ed74102f06d0bb56944a0432a939f0ffb0f546771c351843f3f35d8980a3
font_01_sfnt_off0000f835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF835 21820 bytes
SHA-256: 856a36f88aa541841c7b8b05a83cdb9bc93b74490dd6ebbe8fb39721799b4e74
font_02_sfnt_off00012e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.