Malicious PDF — malware analysis report

Static analysis result for SHA-256 0548831cd6288eb3…

MALICIOUS

PDF

89.1 KB Created: 2021-09-12 19:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 05acfb0e0d5d881ea128756bc8e1e6a3 SHA-1: 1e02763221c6c9eb25f7b087af3adbc78e301a5a SHA-256: 0548831cd6288eb34ce68f68577f96faff504239ea32cde7879ed26b48a8b2a6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it functions as a link farm, directing users to various unknown URLs, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://poojaindiangrill.com/nbloom/fckuploads/file/tunusepoj.pdf In PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/zekusobedemeg.pdfIn PDF document text
    • http://bmfjhjk.friend-match.com/upload/files/14846915216.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/batozopafuxatigemani.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/75369425252.pdfIn PDF document text
    • http://globalbizkorea.com/userData/board/file/94534721406.pdfIn PDF document text
    • http://gewald.ru/content/Files/76168257539.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/59458291719.pdfIn PDF document text
    • http://kayapalinakliyat.net/file/kegasesojodop.pdfIn PDF document text
    • http://zhihepvb.com/upload/ckimg/files/202109011152066897.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/vopetot.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/demano.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/24773697193.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/79185818096.pdfIn PDF document text
    • https://digbijoynath.in/uploads/userfiles/files/ridozuzilalizutomazasa.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/34322229645.pdfIn PDF document text
    • http://tieulongcopro.com/luutru/files/rakumiw.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/20396360319.pdfIn PDF document text
    • http://mobitransjogja.com/files/40640605696.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/45211586880.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109031021481181.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=live+wallpaper+for+car+stereoPDF 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_off0000f7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD1 10480 bytes
SHA-256: e5edc25da2600a723419ef0eda21ffb05b06373b83ba5c348abfcee9bd7e52d0
font_02_sfnt_off000127db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DB 17948 bytes
SHA-256: 733d5b91ba9644998ecc064fb3f7fa03685486087b222a2ffcd140d3dcb24609

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