Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd2dfee44265264…

MALICIOUS

PDF

78.6 KB Created: 2021-09-05 10:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0a84f71d25e1a0dc55a436f56d2f719e SHA-1: 4ca5b4584201f69f18bce5f64e211e90cf4affb6 SHA-256: 2dd2dfee44265264fca48f22e5f24feea6fe4779c3c2566aa68a75369cc7bdee
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://jongauger.com/userfiles/file/zogakam.pdf In PDF document text
    • http://ifa-astrologie.de/userfiles/file/40521638584.pdfIn PDF document text
    • http://sibzakon.ru/ckfinder/userfiles/files/sisepov.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/fo1lgq843e53hlrk54udqla0q4/vilurit.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610136d426f90---55960824876.pdfIn PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/dtddo01h9vp3eo0nop727480b6/fadapebelexudetomexuxutus.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/97502671852.pdfIn PDF document text
    • http://rapet.hu/files/sokejid.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/7s4b30eug3o2l2rm606e3qseq5/92513743260.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/50772194070.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/c2124bc3f9287cf21e84b92861e41b5f/3512364768.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/706824ed169fbbdec1e8a36305f93d8f/61278451169.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c136fb2c7b6---31488898027.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/rokajulasema.pdfIn PDF document text
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/96890504337.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16083d11c14848---13429472263.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/24a0f404ad37123419ac26d5a2bd4ac4/79657216516.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/41659451879.pdfIn PDF document text
    • http://ativn.com/upload/file/74433389634.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/vekopojodezanoridanujovag.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/26527261037.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c85bc480137---16413515619.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/17883159930.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/be24cbb1c0391191460e843210095b3f/44008581042.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=principles+of+international+economic+law+herdegen+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/46bfbe072d2b5d49d4d8cbc2e142d8a3/72835527479.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_off0000cbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FD 11156 bytes
SHA-256: 90848bcf625c9bac5c52e514b81592aa4699a5deca16b79da406074a0c513c2c
font_02_sfnt_off0000fdad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAD 18096 bytes
SHA-256: 324dfbcbcd14bf0768c4b04e00f6a87183950838c051f43a13ce25b7d27bbcd0

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