Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d1ad05fb147d7b…

MALICIOUS

PDF

76.5 KB Created: 2021-09-14 13:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 185d86a89bb919932be34ce37e45aae9 SHA-1: 6776067adf23ea749dc1a114f744022838ec5f44 SHA-256: e8d1ad05fb147d7bc3f09dbf38b96d82a4d448d2fefd343233b842d971e3fd0d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210906030736.pdf In PDF document text
    • https://kasihpaham.com/contents/files/zegudivejovavifarizagudu.pdfIn PDF document text
    • http://byecook.com/ckupload/files/57636438652.pdfIn PDF document text
    • https://www.pollackmihalyiskola.hu/ckfinder/userfiles/files/97908275007.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/37173368494.pdfIn PDF document text
    • http://somkuthyoptika.hu/editor_up/tajoxa.pdfIn PDF document text
    • http://ferien-in-zahren.de/images/file/62911224504.pdfIn PDF document text
    • https://milosislandrooms.gr/userfiles/file/zevibowivizeduk.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/77028376022.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/dojesidokopozojaje.pdfIn PDF document text
    • http://khonggianmang.com/upload/files/fokuf.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210901_232507.pdfIn PDF document text
    • http://suurelepa.ee/data/file/65734356393.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/tonufe.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/movupebutiv.pdfIn PDF document text
    • http://festacreativita.org/userfiles/file/mamivuxalun.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/23756082246.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/55832646428.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/51339814265.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dufig.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/816260623.pdfIn PDF document text
    • http://tvsatkrosno.pl/userfiles/file/77478544970.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=gta+5+ppsspp+ios+downloadPDF 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_off0000c953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC953 16564 bytes
SHA-256: effe3070865cf5c7b6557c7e1021206f7f9832e43b7f1d4fac6cfa7ec1b8814d
font_01_sfnt_off0000f493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF493 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAA 10412 bytes
SHA-256: a8a72927dd5a568d6cb371671a1aa3837da8fb368bdbdf17fe5cad1df744de65

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