Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dcc4eb7c5c8d01e…

MALICIOUS

PDF

85.9 KB Created: 2021-07-09 08:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 68dc4985d5573cca51efababd13a1700 SHA-1: 76385591a7b8237d6450a2c660f6b98cd88f3cfc SHA-256: 0dcc4eb7c5c8d01efd3e42c53c7169e8a3488b1aad43a376dbeb67d6599611c2
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites by disguising the document as legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://ipceurope.eu/assets/file/58205831869.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/nepan.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///2021051405613_708114663.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/mb8vmeit98ftagdj1b29o9aapv/zuvup.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/sefitetigafitezosevob.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/raxiwov.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/21595241376.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/vt4nr777dma7cc29r7gm67l466/fepisa.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608379fc483e4---81264466008.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/97960867101.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/c0d7d8da5fccf8fa10940948d04d6c28/litexitatamet.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ca19181be---sulofiziguvidowetonine.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/dd6d591bb058bbee6d2ca0b24d48dee5/82730526334.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/44241453426.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210613075914.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/4137184881.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/53190aaa13ed28effd3819178ebfafb8/tafaguferubumizesanexegu.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/fgb7rp0fblsbcbbnga9ao0nu53/sepajene.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ddde91bfea3---55591331002.pdfIn PDF document text
    • http://okna-stv.ru/userfiles/files/welupixuxapema.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/zotewesarelawepiwuroxis.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/padotafikisifugidejek.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/d01e85a2d18e3d2223a85e49ce64f19d/91293959459.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/435779146d5283213ea0dcb1a418662e/47540729673.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/17549402118.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=where+do+pdf+files+save+on+iphonePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA3 10556 bytes
SHA-256: 0ecc4f3e9554fc29d6e8decb26e90bcbbefd6ed5a0954b0b75adbe1ac6849d12
font_01_sfnt_off000105a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB5 16948 bytes
SHA-256: 218e882811d0b88350ef4c1407c993903eb97f74af50c1ac5d2690bec6ca06b5

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