Malicious PDF — malware analysis report

Static analysis result for SHA-256 27847d855e392837…

MALICIOUS

PDF

82.9 KB Created: 2021-09-12 14:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1f548076121c2cb5537b190c01b15d6a SHA-1: 2c6e7423f4dc22ae4e0bc4bb12b774f4f0856f70 SHA-256: 27847d855e392837d4a39d869a724fe48c0bba2e07171f55214cd49bc0fb7c3f
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It exhibits social engineering tactics, specifically instructing the user to bypass security measures by pressing Win+R or pasting commands, consistent with ClickFix attacks. The document also contains numerous external URLs, suggesting it acts as a lure to download further malicious content or phish for information. No scripts were extracted, but the overall pattern indicates a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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 https://queure.ru/uplcv?utm_term=truck+and+logistics+simulator+apk+download PDF link annotation
    • https://mackbeks.com/files/file/nuwedajopizosenevulika.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/fifedumakofef.pdfIn PDF document text
    • http://glttek.com/userfiles/file/zomugokuwelenulekenovasip.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/40713574528.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/kugizaxilapadatixe.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/94528229684.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios/files/logus.pdfIn PDF document text
    • http://ilkemymm.com/image/files/67352232521.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/15335517935.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/wadodizipexeker.pdfIn PDF document text
    • http://studiostocchi.eu/userfiles/files/zivotijuzojetanatadoka.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/gokikeditipoxepuse.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/74404764604.pdfIn PDF document text
    • https://markaoyun.com/calisma2/files/uploads/23586550431.pdfIn PDF document text
    • https://lecormier-menuiserie.com/www/upload/files/repax.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/73264130407.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/161311f7b54f7a---pebunimelezug.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/zelupid.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/e13a2d1727a107766c9599d2f6192922/93065822904.pdfIn PDF document text
    • https://hw-power.com/uploads/ckfiles/files/613c9e92d1c2f.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/53368040525.pdfIn PDF document text
    • http://taxfreepoint.com/file/rapodixevu.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/junojub.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_off0000dcf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF4 10964 bytes
SHA-256: e4a08d0421f2415eacd763e1c830cd9984807717a46e4a273fe4da51450e4287
font_01_sfnt_off0000f638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF638 18248 bytes
SHA-256: 96e228fa29d70e0d4f7fe40f6b5bb24fd50e9b6790c9c60ec3e711f4055eb2bf
font_02_sfnt_off00012571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12571 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.