Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c49999ee273e16…

MALICIOUS

PDF

76.5 KB Created: 2021-09-12 07:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cf1f0db96d61928ff1566f73bbff7ac7 SHA-1: bce9dcad289e5b2685f44558e193b4b87f2820ff SHA-256: f1c49999ee273e16c6644a1e7b1ee7954992f7b1c7206b2feddfd2cb4c0ef0ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to various PDF files hosted on potentially compromised or disposable domains, with one URL specifically mentioning 'army game download apk'. The presence of multiple external URIs and a link farm suggests an attempt to redirect users to malicious content or phishing pages. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://clarksville.net/wysiwygfiles/file/vudetovasopukaxebemik.pdf In PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/rizujeko.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/75852140436.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7229b2d76---39837225042.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/66474471549.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-6/20210906185536636152.pdfIn PDF document text
    • https://netkat.in/ckfinder/userfiles/files/tovumitumefasereme.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210910_BCCFC730172452C6.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/85508093303.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/vemuvedisipemebijubet.pdfIn PDF document text
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/putisenedirerepitaxoj.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4c92db15f---84243514528.pdfIn PDF document text
    • http://sobateracota.ro/mm/file/63805978259.pdfIn PDF document text
    • https://segurodegranizo.ar/noticias/fckeditor/file/fiwubobo.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/58056521089.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/devepuz.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/moxifokinar.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/vamolotofofomolivi.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/94921844675.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/xexawunovugulanodawe.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/85485957661.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/34665055251.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613d75ec541a6---97569945574.pdfIn PDF document text
    • http://hanahana.vn/media/ftp/file/zekosen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=army+game+download+apkPDF 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_off0000c653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC653 17880 bytes
SHA-256: 84786fa164bcb88f32e3de674637626cf8bebc80935d5381bd28631fe493820d
font_01_sfnt_off0000f473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF473 10652 bytes
SHA-256: ac3aa2b028bb5d37798166a1a994731d2a80ab91e5a2575399284ca582415866
font_02_sfnt_off00010ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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