Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b7482a6e0c24cd4…

MALICIOUS

PDF

108.9 KB Created: 2021-07-04 06:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 59184591c92858fc6792912ffccc5338 SHA-1: 7a9f68f1aee26527381b64a1b42b58bcec8d386c SHA-256: 3b7482a6e0c24cd4a4cca36aea5dabf4aba72c1c12bb5c81678471ce6628bd27
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9344

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 https://aronabritcan.com/userfiles/file/47619052942.pdf In PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160b56b90eb9f2---42116884368.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160d91cea9681a---29442911363.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e0da8627e26---41327861030.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16218176363633.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/komor.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/06-26-23-27-14-14.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/wofatojaxod.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/940e4ead0e3e207f8e53bc4a1418fc28/xabugipedoladev.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160974eeae2a55---22646330321.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/dakitodolovepepasovogumid.pdfIn PDF document text
    • http://kemenyseprosiklos.hu/upload/file/90976765517.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/1d6d9c0f313adf7cb9732ed7d4f9a5cc/xujebajurajidisow.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3cea98c8f9---20002307081.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3d2c988fb---tisuwesibadimezuxisuwuf.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b4cdf3813---vizalemopuvutata.pdfIn PDF document text
    • https://businesslife.com/content/file/7557565198.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/rojasegujotuperijux.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ef6be53ce---sasavobodovutikiliv.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/3a6acef93557d83cc7a7272a476dd518/wujanu.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b523e856ca6---jekomezimobopikasaxukes.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bde725610---2001957112.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210701015230_jsm2tm.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/1748184119.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/914212517587bfef3abc78198c5a0d74/97704010605.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/ti061bddh3tbc9qej0vtf5tjgr/sigolofuzojavijado.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=paradise+lost+in+englishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001743c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1743C 26640 bytes
SHA-256: bafb3970a3197f8ecba89b8dbb823b84a2c0c83c82cc435d2808b4c980e6a221
font_00_sfnt_off000100a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000118b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B2 22112 bytes
SHA-256: 1c27a6384f40e3c47793d2aae0838fd646ebab5f0740586e5c9117140901841a
font_02_sfnt_off00014f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F18 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_03_sfnt_off00015c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C98 10528 bytes
SHA-256: 6cc9d1458c5c025f6e51023eb3d76be1ed1f5b2a68db727a1f93625d42aa6ac2

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