Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10e82ef2d4037ce…

MALICIOUS

PDF

71.7 KB Created: 2021-09-25 08:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 78ee554c6951a76eff4f5fe3f5179efc SHA-1: 1127e33825ab47060ecd6f93d6dc811b8cb33def SHA-256: c10e82ef2d4037ce841533aeca28e1f2cf086587093100cb1bd28d76c387d00a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document contains numerous links pointing to potentially disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://nepalihemp.com/ckfinder/userfiles/files/jewazu.pdf In PDF document text
    • http://daltan.hu/userfiles/file/48003861732.pdfIn PDF document text
    • http://zgic.ru/!upload/files/49091530627.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/69953597644.pdfIn PDF document text
    • http://aptekainternetowa.net/_mdm_apteki/file/wafota.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/gofojizofived.pdfIn PDF document text
    • http://metalltechnik-kutschi.at/78004805107.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/53402936002.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/sajabuzoxivogusufibi.pdfIn PDF document text
    • http://fthyhs.com/resource/docContentImg/file/2021-09-08/02a853f731f4eee282c5ed9c03aa4df6.pdfIn PDF document text
    • http://porpora.eu/imagenes/imagenes_contenidos///tufilomilatatisexujibifis.pdfIn PDF document text
    • http://police8coop.com/UserFiles/file/basojikomuzos.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20210911011014.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/dezavalikikigupax.pdfIn PDF document text
    • https://indiachristian.org/uploads/files/10035235447.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/mujalow.pdfIn PDF document text
    • http://leprofit.ee/cmsfile/contentfiles/tunefalenetewolu.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614aea00246b1---58993000662.pdfIn PDF document text
    • https://mimpiindah88.com/contents/files/90141494491.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/nofatewu.pdfIn PDF document text
    • http://cncsprings.com/d/files/bofikes.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/0f0cf87f2231601e96e8f7805c97eef7/mepovezefesenibokudoxewiw.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210924_070516.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+do+i+change+keyboard+settings+on+androidPDF 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_off0000b2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB07 17692 bytes
SHA-256: 5682237ac8168ae3c5031fc7d6baba738e400fa7537ab95a45f62309c073a198
font_02_sfnt_off0000f782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF782 11024 bytes
SHA-256: d75701d32b95d4c507e3ce3f2c43fe54ce58f66557e6a25619837717ed0dd673

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