Malicious PDF — malware analysis report

Static analysis result for SHA-256 a774911397e4c56e…

MALICIOUS

PDF

90.9 KB Created: 2021-08-20 15:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e2479f876271cf1c131e222e4fd0bb43 SHA-1: cc8010bc6e6f0d0b89831c740d654658ec4b7469 SHA-256: a774911397e4c56ecab7484a2e5c3d8f7f6f7a35026758d5b0e636f3cef24448
156 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. The file contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for information. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=rosario+a+la+divina+misericordia+cantada+completa PDF link annotation
    • https://armagedonspedycja.pl/files/file/pazakowasijo.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/64962380144.pdfIn PDF document text
    • http://aplus.to/userfiles/file/69994558425.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/ckf02qs0qivu00249lrnugrmlb/jibenuvisagagisop.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610563b7b153c---wonoxibow.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/97436518531.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/snv641n1d84fu7k9hepmkf04sl/dazezabanafomosu.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/duzazulariduwanumik.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6864c6668d---62250025124.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/vtu6pim8os9lvilk3rd6f0rt6e/69285185511.pdfIn PDF document text
    • http://benly-carson.com/product/files/febezirurawabo.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/29474158510.pdfIn PDF document text
    • https://tenutaedone.com/filesUploads/file/18993725688.pdfIn PDF document text
    • http://apsons.eu/files/file/bozebogevugelezexim.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/d4dc907df1a930bc020d64c998435a20/49745830241.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a4057b511---nonufujubifejegapa.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/436111461.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/a1grfen3vi1ogmal8s8squhe9j/3330970566.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/1248755e68af033b83dd4ebf95990db9/70798141844.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/11224863310.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160be9517119a4---bategatoxu.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/4996246251a1633c13f04f8642b16457/jivinamapivegufilubuja.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609631ac9416e---44599219947.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/ed6e413ad76b6466b050ed600d261f61/lisibezuzebamajijinu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C0 16944 bytes
SHA-256: ef0329dac4803480f2d6f4d9e9c4ba3aed2817dbf0857a17f9b8becfccd91a33
font_01_sfnt_off0000fb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0E 18232 bytes
SHA-256: b3428f7e77b90ec5bdbfa394718fc13551a065dd5a69716532ef1642b8f5297e
font_02_sfnt_off0001298f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000141a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A6 10784 bytes
SHA-256: 0e0258908cbe953456fbf7e2df53bd493a6f14de9860cfa0a34fc2bcb8331af8

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