Malicious PDF — malware analysis report

Static analysis result for SHA-256 e397d86a0ecdb379…

MALICIOUS

PDF

85.2 KB Created: 2021-09-19 11:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1d0598e7b8fd107878067c74a64b396c SHA-1: c7414f1f1a17ff8ddb5d82059f6381285e86ad35 SHA-256: e397d86a0ecdb3797796c5128b27ad59123187e76f5b6ab34aadf61d345be2cb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs and is flagged by heuristics as a link farm, indicating an attempt to redirect users to potentially malicious external sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://jgranit.pl/userfiles/file/xalisuwi.pdf In PDF document text
    • https://bushregenerators.biz/userfiles/files/ravujakedogetudizon.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16142787bbf4c0---125052045.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/bewuvebigixipazinaneb.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142168379e34---86711230404.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/20142900284.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/36056110585.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/7501648651.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/88223546997.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/85815853392.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/sutoxixujekam.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/43153740365.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/satasuzunamu.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/33523994430.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/gutidamez.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/20020630698.pdfIn PDF document text
    • http://syntra.pl/userfiles/file/32002279145.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/vukutad.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/5100840950.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/66395400691.pdfIn PDF document text
    • http://suchanekstomatolog.pl/files/file/nidipe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+make+pen+for+android+phonePDF link annotation
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/23774272574.pdfIn PDF document text
    • 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_off0000e8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D5 17620 bytes
SHA-256: 6b8a22670e794c351928a0af6b2ad54b68e3f04490c7d9525487a3bc45922422
font_01_sfnt_off000116e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E5 10716 bytes
SHA-256: 4c6f53ab2d7263d7c0ba61226c49adb3e399303a18b1500b3e24f21630b24258
font_02_sfnt_off00012f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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