Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0af671ca51a5ca…

MALICIOUS

PDF

79.0 KB Created: 2021-09-07 18:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cc7f047fdd9fbaba433217c743dd1125 SHA-1: 25f6df5c799f1f4d1883d1e21b0de3af47a728c7 SHA-256: 2f0af671ca51a5ca8299c6b191c7db7bf6daae5d8dcfabcd69262a9225857816
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URLs point towards an attempt to redirect users to malicious content, likely leveraging a PDF exploit or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://synerhu.ru/uplcv?utm_term=darwall+philosophical+ethics+pdf PDF link annotation
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/1886917f7bed8fd553c5f33cdd7619ff/jedibezog.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/79807108510.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/puzakumepujezikinoz.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/uplpm51l7m7m049dp5r36tp121/87675029340.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/munudanowitunode.pdfIn PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/22810509374.pdfIn PDF document text
    • https://takitech.hu/userfiles/file/15109062627.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a67c0d8572---xekagovamebonakokagid.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/6915516421.pdfIn PDF document text
    • http://praguetransfer.com/files/file/96506564412.pdfIn PDF document text
    • http://baggiez.net/userfiles/file/dijikudusubataxemi.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/73264961196.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d3b2a589cd3---43600431393.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/afk3kttbmk08o1u7fh13bq7tf4/27820472404.pdfIn PDF document text
    • http://yuha.be/_files/file/gibizewej.pdfIn PDF document text
    • http://hciclerp.com/asset/uploads/files/duwilim.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/zegesunabiwowutitekovid.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/n3n267h5n728ih5bsco3ils1su/tegabisuzojopepixolodi.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/fafuwavalidelakeno.pdfIn PDF document text
    • http://2016.letnifestiwal.pl/ckfinder/userfiles/files/90338419224.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/f11a02299e4763aed1cc8336b033983a/xipap.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/29129318367.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/puwurapel.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_off0000d0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C3 17372 bytes
SHA-256: 3ba070be5d51d2349d78114ca0845c4535fe82c9647128085b7b1e213baa6909
font_01_sfnt_off0000fdcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCD 10700 bytes
SHA-256: f995a3fcf596ff086de4581bc25d0f15122101497281847e4942d348d436afcd
font_02_sfnt_off0001168e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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