Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4de82c71a616f1…

MALICIOUS

PDF

90.3 KB Created: 2021-09-16 22:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 69b69e7c0f2d341e2b3706f0789d6a6d SHA-1: 4a3a6d246729eae4a5f2f4cd8509f9bd13596ea5 SHA-256: 0b4de82c71a616f14927e4390a68a431d0bea18bb39a7bd06eb9f1dee90b185e
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, and parcel delivery to deceive the user. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to lead the user to download further malicious content, likely exploiting PDF vulnerabilities or social engineering tactics. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://goldenpeak.it/userfiles/files/zajimepedawopagidewiroje.pdf In PDF document text
    • http://lulanjina.net/upload/files/bedagajiresixubivijup.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/68305908652.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/47796243313.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/josis.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/garibusowenafiloturodos.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613186899e2fb---38889784706.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/kalumezizeverax.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/14256508743.pdfIn PDF document text
    • https://havilahbuilders.com/userfiles/file/busekonodu.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/202198_13513_500.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/gusenukireru.pdfIn PDF document text
    • http://keitbg.com/images/files/12956181814.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/xitefifet.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/328e5f9ab40a56d1b2fa7992bf98c0a3/45809454468.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/joxuvixodimularulavij.pdfIn PDF document text
    • https://emotionalgift.youngzonejewelry.com/ckfinder/userfiles/files/rozidokukuroralu.pdfIn PDF document text
    • http://cuanhuaabshanquoc.vn/files/93267494709.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/taforusonovavegu.pdfIn PDF document text
    • http://keralastatetailorsassociation.com/userfiles/file/dopexikijuxerirusawe.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/duwunurijunivunozonejuj.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/nitudetaworimogev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=star+plus+live+tv+show+today+free+onlinePDF 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_off0000fab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CF 11036 bytes
SHA-256: 2870485a42f40551f0d935ffeeaaef6e2353bb6fc12206890341ad7a51899925
font_02_sfnt_off00012c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C79 18180 bytes
SHA-256: 204c08e06208ae9b429cbaaaa521490b002793cdd34dedbff81a543cd4cb627b