Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2516e137a7937f…

MALICIOUS

PDF

68.2 KB Created: 2021-09-09 02:09:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fef3278d078fa136f6a7f235e114d1d5 SHA-1: 3af66b1cfc26864770d420d4dec12f5b1c1d016c SHA-256: 1d2516e137a7937fe614d4dfb98349a8a55a058d5d82bc707331a535da5cbc83
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple unknown URLs suggests a link farm designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://stcc-sa.com/motakamel/Ups/files/27821948780.pdf In PDF document text
    • https://melz-feu.ru/upload/36901016553.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/gorabidizikewilobutip.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/kefepapizosarav.pdfIn PDF document text
    • http://dlastudenta.org/Upload/file/zusamuga.pdfIn PDF document text
    • http://kindergartenhelden.at/upload/file/zenosasamidoxat.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/99011668260.pdfIn PDF document text
    • http://minhledtran.com/luutru/files/74777277429.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/sikovuxaguzuse.pdfIn PDF document text
    • http://manegedebuitenwijck.nl/uploads/file/99974920694.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021090313571373499.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/090105339288.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/pilikemum.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/96023891236.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/28547154855.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/13050545796.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/56043997728.pdfIn PDF document text
    • https://beruanglucu.com/contents/files/sepubenudo.pdfIn PDF document text
    • https://aaaxxion.info/images/file/talazevavunuvigoxarose.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/wojebufivixifug.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/23238441785.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16133c8f57c546---kepuzawejozogub.pdfIn PDF document text
    • http://chinahk-ip.com/chinahk_ip/html/files/editor/file/27876269598.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/tibav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=subway+surfers+for+computerPDF 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_off0000af69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC780 10912 bytes
SHA-256: bb86c4c3f3ec1d480d7937e2da17962e14f8fb6796163cae5dc06ee0dddb14b5
font_02_sfnt_off0000e0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B9 14064 bytes
SHA-256: 5c9e3dddbaed7f2608ab2bf7e18ce38f12a0601526c536e381eedf0883943053