Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa1e3ee79447612d…

MALICIOUS

PDF

81.9 KB Created: 2021-09-10 20:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f106f96553c563bd353e21d85d8abb02 SHA-1: 5af8020fbdf7432110911585c43b984d82bfcc95 SHA-256: fa1e3ee79447612d35030c5f4aaef4940fa857c50e2cc1d4335aed42353be0ba
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. Numerous embedded URLs, many pointing to disposable domains, suggest a link farm or phishing lure. The presence of a QR code redirect lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://ciaooo.ru/uploades/userfiles/file/58627134639.pdf In PDF document text
    • http://bafiti.com/sklep/userfiles/file/pegoxupatikukizibudefom.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/fakemoge.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/lesifigifopuperaxozunixaz.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/65059971179.pdfIn PDF document text
    • http://santabruna.cl/upload/file/vufanawamaxisovuwenorub.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/zikizofiduxamurovudesivux.pdfIn PDF document text
    • https://hometutorsdelhi.com/userfiles/files/60794609807.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/17693868795.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/futurofoxifonabusumifujij.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/00af1352f7ce2906e5b64d0bbad5477f/fovunum.pdfIn PDF document text
    • http://cuacongtudongbinhduong.com/upload/files/naxulisuxumozene.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/jobazelejopiwalafaposiz.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/17526496189.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/8179405114.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-9-2/20210902110256497931.pdfIn PDF document text
    • http://lamay.de/userfiles/file/lonewiwevibuvapurilibef.pdfIn PDF document text
    • http://mopi.eu/ckfinder/userfiles/files/buxufonuvolidomiwopit.pdfIn PDF document text
    • http://bookblog.kr/data/file/files/kadukadudetuju.pdfIn PDF document text
    • http://paulgraphics.paulsfashion.in/files/72431628301.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/8597884299.pdfIn PDF document text
    • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/30350279269.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ockfn5diprljjdiad5fvp9u9c2/jururonow.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/gusepixozavebopagizapu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=android+file+manager+with+smb+supportPDF 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_off0000d9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EB 11252 bytes
SHA-256: e4b66918518f7b4e6cfcb8fb8603a6245d67c7410e2b3c4ae1d1f82d9ba181d3
font_01_sfnt_off0000f3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD7 17580 bytes
SHA-256: e0d4c3feb8e79763d8059c839b6f4269f5548df41e17c329fa6567a2c62239e5