Malicious PDF — malware analysis report

Static analysis result for SHA-256 9046ffff353bf168…

MALICIOUS

PDF

81.9 KB Created: 2021-09-12 20:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 08a83907ec77ecf3a1c5b453565117a9 SHA-1: 7eb4231f5fbf14515a3c933914cd80aa52781b3e SHA-256: 9046ffff353bf16818990538309bfdaf3c3a735b15907e87cb0774b5e34693d8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to other PDF files hosted on various domains, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the structure and URL patterns are consistent with a multi-stage attack where the initial PDF serves as a lure or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://unitjaya.com/contents/files/rajadefebimagimixajebut.pdf In PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/zajokimorotis.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/viwonipamedaj.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/wuworukuwepomefi.pdfIn PDF document text
    • http://ohxto.com/uploaded_files/userfiles/files/tijamowifusiz.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/35417796378.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/450790852.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/roremotusowajitejimofoki.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/49557312432.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/22119854622.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/77099275766.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/pedisepa.pdfIn PDF document text
    • http://wamaeassociates.com/images/uploads/originals/file/pivagunesatitaroxu.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/34047498148.pdfIn PDF document text
    • https://loyalangkorapartment.com/userfiles/file/zomasuzuzotivepem.pdfIn PDF document text
    • http://eternaseguros.net/files/files/22465492300.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136daa50d38d---77941479865.pdfIn PDF document text
    • https://rux-thai.com/ckfinder/userfiles/files/5298052639.pdfIn PDF document text
    • http://bmfjhjk.friend-match.com/upload/files/wumuw.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/62963471392.pdfIn PDF document text
    • http://dierenwinkelindex.nl/images/uploads/24578741010.pdfIn PDF document text
    • http://yljczl.com/uploadfile/20210909080335450.pdfIn PDF document text
    • https://vnycc.com/userfiles/file/medinalamuwi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=message+notification+but+no+message+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_off0000d9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DA 18172 bytes
SHA-256: 527d3b260d9d6f87494f8a33dc990693f644597e6f9f745c10a7c8506c689e0c
font_02_sfnt_off00012098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12098 11008 bytes
SHA-256: b15dbeeee1496bcbaf0b13f96d00e2943d29c4575fc299b67c1f46be5639b977

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