Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b542544553c606…

MALICIOUS

PDF

68.1 KB Created: 2021-09-24 22:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 29a81fb1879104b39df3c16079a3e7c4 SHA-1: 50eb865fc52e59b1c685f280aff0b78015d6bfdc SHA-256: d3b542544553c60624e8bb130a5004c4ffc00a66891660bf666f55839ac5180e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common phishing tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://equator-maritime.com/userfiles/file/78784358280.pdf In PDF document text
    • https://lideregitimpaketleri.com/calisma2/files/uploads/9265404481.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/63695073081.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/88024179195.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/dapuzeziw.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/46616056522.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/77954601279.pdfIn PDF document text
    • http://smelawservice.com/file_media/file_image/file/woboduvozafo.pdfIn PDF document text
    • https://pindimana.in/uploads/file/59756934060.pdfIn PDF document text
    • http://superazs.ru/images/news/file/beligow.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/25449229667.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/11690753922.pdfIn PDF document text
    • http://thephinhmienbac.com/upload/files/70106884997.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8f3f40652---65887253474.pdfIn PDF document text
    • http://refah4ter.info/basefile/hotelrefah4terir/files/35267312179.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/bateziwul.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/87576723894.pdfIn PDF document text
    • https://iphastkala.com/userfiles/file/wikudejesop.pdfIn PDF document text
    • http://sgrdpandher.com/userfiles/file/14760090846.pdfIn PDF document text
    • http://yilip.net/userData/board/file/28109928902.pdfIn PDF document text
    • http://izmirtavla.com/upload/file/45334359384.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/nufotegevopalizurelazit.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/81110883441.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=nova+launcher+reviewPDF 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_off0000ad39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD39 15428 bytes
SHA-256: 0401ecc3846300c86808a040d6f54fc055a8a50cec26674597ce0514355b3327
font_01_sfnt_off0000d42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42A 10288 bytes
SHA-256: 6f6033b839cc63a5e90a0360e6655137be090aae2368e025af9343fb22a7fa85
font_02_sfnt_off0000eb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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