Malicious PDF — malware analysis report

Static analysis result for SHA-256 9afa061704bc7795…

MALICIOUS

PDF

85.0 KB Created: 2021-09-16 10:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 39bfed51fe38b3d221d9a948171abd69 SHA-1: efa1622cac353d408c310efe4d020fa112c5102a SHA-256: 9afa061704bc779529486a4c7f8b48802fb40c3c097b8231a124fe8cdb41abff
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external files, many of which are hosted on disposable domains, indicating a link farm designed to obscure the true destination. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the high ML score strongly suggest malicious intent, likely to trick users into downloading malware. While no scripts were directly extracted, the structure and heuristics point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://air-ned.com/uploads/files/55960802310.pdf In PDF document text
    • http://otczenacts.com/media/files/80666344223.pdfIn PDF document text
    • http://lycee-elm.com/userfiles/file/wemetevutogu.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/76220359401.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/89824873030.pdfIn PDF document text
    • http://veitali.com/upload/files/25476818151.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/9754997225.pdfIn PDF document text
    • http://termocity.by/pics/files/nonasopabiz.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/2868567467.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/xulikazalekamavu.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/muzefu.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339c7f3379f---dexibazipus.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/46093153610.pdfIn PDF document text
    • https://austarpharma.austarchina.com/upload/files/fakefovesirekuro.pdfIn PDF document text
    • http://digjamaica.com/app/webroot/files/98864269023.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16131335b10acd---wosepa.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/36520057078.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/85781519169.pdfIn PDF document text
    • http://springgalleryng.com/Images_upload/files/78173818244.pdfIn PDF document text
    • https://franciscovalles.comtraining.cl/userfiles/files/riwobolikolapifumezofeki.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog/file/mikud.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/abb3c8deb610cc63558ec2ad27798fe3/6488267679.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/fuwadonidasarazo.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/dutijaginurepabom.pdfIn PDF document text
    • http://lrm.mcdonalds.ua/ckfinder/userfiles/files/zelomudejimixezodedir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=quiet+place+2+full+movie+watch+freePDF 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_off0000e23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA51 19316 bytes
SHA-256: f4ff0bf8b417f5cce3c5fe798d9f4d7e0550c10d22d50b1ca0a9ce81e5c2e3ac
font_02_sfnt_off00012d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D16 10904 bytes
SHA-256: c82f9cc590c2cbbfd74c512bde9e4bf057f9c3ec8543fc09edad69687c9d629d