Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c2f703d2e887c2…

MALICIOUS

PDF

82.6 KB Created: 2021-08-15 19:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 437ec54604f3be44855404bfd35830aa SHA-1: db8100a73b4f22cfe2ef491c10ee1f432a5ac346 SHA-256: e7c2f703d2e887c298f265463dab1892d58b40f79d52099e0653104205383fc5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of JavaScript indicates an attempt to execute code within the user's browser.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/832036168dc58b6f6269d20c0c9ce998/jikag.pdf
    • https://xetnghiemadndanang.com/upload/userfiles/files/kurefamuporezojijuxulofi.pdf
    • http://stepasidemedical.ie/images/uploads/file/59962017334.pdf
    • http://timebank.ru/sites/default/files/photos/pagefile/15692322573.pdf
    • https://honda-otolongan.com/upload/files/22553493529.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606f62afe39a0---rotopirop.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/4ddvak3pp5omnji48f7ba20jha/28115761984.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e5d6778f83e---56842674434.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0f54b56c9---tanefedebu.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/h3mlepbgano3vshc2denmvmr82/86032894510.pdf
    • http://buffagiuseppeinfissi.com/userfiles/files/saremo.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f2f38bb39---82230468896.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a25bc1047d3---wexulajekawifodolerafem.pdf
    • http://campbellelectronics.com/uploads/36096854254.pdf
    • http://scuderia512.com/js/upload/files/nufuxivipelapepinegefa.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/fda18d7e4edd293b3eb8e75b947103c6/raxopesuv.pdf
    • http://world-green-hope.com/uploads/files/70419504612.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/edbde5a9b17f6f6535d39a8155ecf499/lejidoboxolukejawiw.pdf
    • http://jucal.es/images/file/74174534989.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c975ea1cad9---83066029054.pdf
    • https://partnyor.az/userfiles/file/xomur.pdf
    • http://yesilderecine.com/admin/editor_resim/file/51896425318.pdf
    • https://irantruck.ir/data/file/mutapod.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=doubling+and+halving+worksheets+grade+3
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA79 16792 bytes
font_01_sfnt_off0000f28b.bin
18df215034a0ce6e7427db064cd16d01653fdc11d73dc6a4fb6fa85f26e5c05e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF28B 17572 bytes
font_02_sfnt_off0001206b.bin
6a83b5cf04f5dc343687b0d5a893291320f5ac5aacec163a5bbf62068df8609a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1206B 11184 bytes