Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ccb18657a347063…

MALICIOUS

PDF

91.1 KB Created: 2021-09-22 20:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 69d0a5e056cecdc84d67db56ebcd7272 SHA-1: 3267efa48afc692d2b211210fea762f34ac4d103 SHA-256: 1ccb18657a347063d193f3b7ab1562f54df0a71aa191bf3bcb22d39beae9f6ef
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, suggesting a phishing or malware distribution campaign. The presence of external URIs and the overall structure strongly suggest the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://huntic.ru/uplcv?utm_term=whatsapp+for+samsung+galaxy+s3+mini PDF link annotation
    • http://bn-biz.com/userData/board/file/kemejavurifutepinaka.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/45575037345.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/wujixajewaveweraxekabasom.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/44497424842.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/81848074976.pdfIn PDF document text
    • http://lse.hu/userfiles/file/takuzikoxipo.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/paradojamaz.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/63398513860.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/duwizafibokol.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/xeruxewatigikesugumipuk.pdfIn PDF document text
    • http://opusbiz.kr/data/editor/file/517336834613d955617039.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1614255a2afbc9---64378690533.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/talevovozaxak.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614592271713e---xupuxasukefaxaku.pdfIn PDF document text
    • http://saimiri.name/upload/file/mivunodewuxe.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/pikezin.pdfIn PDF document text
    • http://www.addvanceo.info/userfiles/files/82581852328.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/kojovamo.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/xikisodakixibaterize.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/nisamu.pdfIn PDF document text
    • https://matteagianotti.ch/userfiles/files/jezutovi.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/41039012997.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/9400274723.pdfIn PDF document text
    • http://gnox.vn/upload/files/27653792479.pdfIn PDF document text
    • http://haki.vn/uploads/files/18506004365.pdfIn PDF document text
    • https://rajatotogroup1.com/contents/files/61145764838.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_off0000fc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC12 18576 bytes
SHA-256: 0770e55c25fe15181605d01db12b51e12253aba6c7849aa7f48e873069088315
font_01_sfnt_off00012bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEC 11156 bytes
SHA-256: 9d7b30727047d2f5159eee54a716401ca73b573e2d21ef3b8a00c9184241815a
font_02_sfnt_off000145e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1