Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d63bc167827b78…

MALICIOUS

PDF

82.7 KB Created: 2021-09-22 15:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 94288ca45485c237e7f20c312f1219d1 SHA-1: 8d6df41960aadc162e968b57fc40aeeb1bb28299 SHA-256: 07d63bc167827b78879687d47fed3b1e9c2ace59391fc402ff3e108c01db92c5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution intent. It contains numerous external links, many pointing to potentially malicious domains, suggesting it acts as a lure to external content. The PDF structure and embedded links are consistent with a spearphishing attachment used to redirect victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dmhu.eu/uploads/uplib/file/xagexod.pdf In PDF document text
    • http://urduhadith.org/survey/userfiles/files/tepetixa.pdfIn PDF document text
    • https://ultralloy.net/upload/files/25455687999.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/jawubarewuv.pdfIn PDF document text
    • http://hak-al.com/resimler/files/26641939368.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/41688722932.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/takukolanevowijoduru.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138481c864ea---45989239493.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/378f6507ee23f8645215eaf291bfb05e/81343714985.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/rizibaliwule.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/nisawep.pdfIn PDF document text
    • http://liderzy.natura2000.pl/imgturysta/files/26477395306.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/bobopededusetiv.pdfIn PDF document text
    • http://bienbao.net/uploads/files/39819672951.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/penulixepiriken.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/wugivuwox.pdfIn PDF document text
    • http://hantechwelding.com/userfiles/file/2021091320573873499.pdfIn PDF document text
    • https://marblo.marblobaths.ph/app/webroot/img/files/pefonado.pdfIn PDF document text
    • http://stillincontact.com/images/mails/file/91516067181.pdfIn PDF document text
    • https://mfdesign.hu/files/file/dapigereman.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/96249140034.pdfIn PDF document text
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/xatiwemimufamevizazig.pdfIn PDF document text
    • https://mmgrowersg.com/ckfinder/userfiles/files/69262767239.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=villager+guard+modPDF link annotation
    • https://easyown.ddproperty.com/datas/files/54588438443.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_off0000d8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D6 20324 bytes
SHA-256: db433462ee392b7d407b0753dbd2759f68d06fb99e9cbc39d1c98bff6b120ef2
font_02_sfnt_off000126a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A7 10288 bytes
SHA-256: d24554d372d1c2a1569ae1afd45be492fd4a6f5c3568e45a6e58a3018f1736ed

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