Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae11008c6ce398d5…

MALICIOUS

PDF

88.0 KB Created: 2021-08-14 02:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 21ab23e9520fde06a15115a6a6e6992d SHA-1: 32c1f6ae5fd15ac0bd4ef6a7116556ded171294e SHA-256: ae11008c6ce398d5a05b71307fd63f909d82a4083908a895556daf528fefa31b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to other PDF files hosted on various domains, many of which are flagged as potentially compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a link farm designed to lure users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://navigator-nsk.ru/userfiles/file/gaxoli.pdf In PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/is2oveguicubhubfae5d8sti40/zibakulit.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16074506537cd2---fubaj.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210707/file/72617001637.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/93598472234.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/62029002409.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/26035239764.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/c3130f573d1f572d1f3e53762ac145ed/89729780023.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/fdc192ebdd6122c88c91b7a2812b4223/42435695028.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/47668178176.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15074232fd---38277366349.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608710ff47ed7---luruvimopewuzemu.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/75780912517.pdfIn PDF document text
    • https://mihalex.by/files/files/jonom.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f989b748d---1495976011.pdfIn PDF document text
    • https://topplene.com/upload/ckfinder_temp/files/20210629144327.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/wogodeligepala.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/ktblnptna86h9mh1s375ajaekl/rurenoxezarofu.pdfIn PDF document text
    • http://chayka-svg.ru/files/66109678164.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/a6115635174f10204a11410d10a5f5ed/40687002293.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/fa2f4b8d929d99313b3009fa07fb49cc/77177578700.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/161037017f214a---ravovitofozubegilokir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=letra+parecida+a+century+gothic+en+canvasPDF 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_off0000ee5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5B 19352 bytes
SHA-256: b48e6cbaf01e6fdd9efca7eb26016a70dfffafad8ceeb6422d02b4c68110d1b3
font_01_sfnt_off00011eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEA 10984 bytes
SHA-256: d2215bd9b6209fc2d580146268bc6da6260138027c26bf9f238cf5243f0c4eaa
font_02_sfnt_off0001382e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1382E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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