Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15f05d1a820b32b…

MALICIOUS

PDF

82.3 KB Created: 2021-09-24 20:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b579ff23ab0151025cfac0b8b4e9f099 SHA-1: cb4fe6846120ad6279759c60d42f53741ae876bc SHA-256: a15f05d1a820b32b84dc76486641250e44e96eb41b32687e0030e20797686bef
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to suspicious domains, and one heuristic specifically identified it as a link farm. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially harmful content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://ppogrimall.com/upload/editor_image/file/23844112213.pdf In PDF document text
    • https://renebeumer.nl/userfiles/file/54443864318.pdfIn PDF document text
    • http://splogservice.ru/content/file/85278899720.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/xizasimosametejiramamiwi.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/1804181137.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/sijavujeje.pdfIn PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/zaxerege.pdfIn PDF document text
    • https://baobiachau.com/luutru/files/selisig.pdfIn PDF document text
    • http://pbhdom.eu/userfiles/file/84475198166.pdfIn PDF document text
    • http://theponghop.com/upload/files/munozadivexixilefevabubuz.pdfIn PDF document text
    • https://jphotographyllc.com/userfiles/file/mojuronavilupenofiki.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/48332402090.pdfIn PDF document text
    • https://edouardweil.com/userfiles/file/72325841970.pdfIn PDF document text
    • https://vnycc.com/userfiles/file/74908587562.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/17124834098.pdfIn PDF document text
    • http://waypl.pl/upload/File/72097866531.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/savim.pdfIn PDF document text
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/zasozerurazojalonojisun.pdfIn PDF document text
    • http://goldenmallbiotech.com/upload/files/rinosu.pdfIn PDF document text
    • https://kingbakerypans.com/userfiles/file/jimafesufudoji.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/dulaga.pdfIn PDF document text
    • http://theseadiaries.com/ckfinder/userfiles/files/5932711256.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/lukeratijufizekeximatoge.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/81198272465.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=john+wick+3+download+in+tamilyogiPDF 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_off0000cfe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE7 10872 bytes
SHA-256: f6fa733d7ad19e8ad9cd2f6f707398a1af911071629a72c9f911b26907bad1ea
font_01_sfnt_off0000e8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C4 22232 bytes
SHA-256: 795aed4665e87841b40a15758eb5fb9d03de35590c44bfbbfb1c2f05470f8779
font_02_sfnt_off00012319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12319 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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