Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f2247b0f40ac59…

MALICIOUS

PDF

67.7 KB Created: 2021-09-24 15:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 03941574dffc2349d50efa64dd44363a SHA-1: fe86dd8e50a765fe8ce0a22b6e9c353d8fbba06b SHA-256: d3f2247b0f40ac591439e5591c4cebb3db0b8b03aa4d617c05d15523f99171a4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as a phishing lure due to its small size and image-heavy content, typical of a screenshot used to hide clickable links. The document's structure and numerous external URIs suggest it is part of a link farm designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://gzlmjx.com/data/home/bxu2343160066/htdocs/uploadfile/files/ponolatavivurinosop.pdf In PDF document text
    • http://collectifff.be/imgdb/accueil/files/48278470636.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/75454960607.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/35077032617.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/fugunedova.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/fitibifevidomulan.pdfIn PDF document text
    • http://bigbulkbags.ahmadpackages.com/survey/userfiles/files/73796973124.pdfIn PDF document text
    • https://kaptenhoki.org/contents/files/12501863698.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/wixobumesiwisekububevuw.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/binonekivevula.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/mesimaxadodifubedapas.pdfIn PDF document text
    • http://topliving.sk/userfiles/file/webot.pdfIn PDF document text
    • http://www.facyt.com.ar/ckfinder/userfiles/files/96325198106.pdfIn PDF document text
    • https://stl-log.com/htdocs/cljr/data/files/31977312670.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/58290882438.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/38545640389.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/89693219454.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/siwenonewodowodiwatazul.pdfIn PDF document text
    • https://mepho.hu/ckfinder/userfiles/files/52943198560.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/mozimevikameravur.pdfIn PDF document text
    • http://hizirferforje.com/admin/fckeditor/editor/images/file/tabujovisav.pdfIn PDF document text
    • https://castel.ro/userfiles/file/wekumajiri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=scratch+software+download+for+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_off0000ac4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC4D 14020 bytes
SHA-256: 86bb48d94c4cc96170c2488379d890da3c71cd3a3b6db29afd48ab5fbbbd96ee
font_01_sfnt_off0000cec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E0 10732 bytes
SHA-256: 4216a1e3dc7df42b22c5f61bab17c040fccffefbcaa32936c0ccc26989ca739c