Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4649fcd54e4ccba…

MALICIOUS

PDF

67.3 KB Created: 2021-09-20 08:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a4ff9750bcaff305805dff44205cea57 SHA-1: 5a12b9d905e7666b1c3204ba073498e8ca48460a SHA-256: f4649fcd54e4ccba5fe484baf336b7458dcf1bc1caeafee8a58074f2b98081ed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, employing an image-based design with embedded links to external websites. The presence of embedded JavaScript and the ML classifier's high confidence score indicate malicious intent. The document likely aims to redirect users to a compromised site to download further malicious content or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 1 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 https://allytemp.ru/uplcv?utm_term=alpha+guns+mod+apk+download PDF link annotation
    • http://quimis.org/js/ckfinder/userfiles/files/42785396613.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/18405250987.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/kubagawevuras.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/09/13/59825362412.pdfIn PDF document text
    • http://menifee.hanasushichoice.com/uploads/files/19568807676.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/nedokoxunipudoraxigawumed.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/dafuwaxi.pdfIn PDF document text
    • http://zerosquareonline.com/file/99933586749.pdfIn PDF document text
    • https://winstar-tools.com/UserFiles/editor/file/62989938081.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/mevamidetilapufoduzow.pdfIn PDF document text
    • http://yanartekstil.com/firma/files/42367462388.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/40069640667.pdfIn PDF document text
    • http://luatsugiadinhviet.com/upload/ck/files/96469723387.pdfIn PDF document text
    • https://santaclara.com/wysiwygfiles/file/86889878468.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/37036569649.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/72492069683.pdfIn PDF document text
    • https://stormester.no/files/file/61131325880.pdfIn PDF document text
    • http://cocoal.com/uploads/file/23547591396.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/95276701609.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/76687218050.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/96347625959.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/56532778374.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_off0000ac9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AC 14184 bytes
SHA-256: 17b14530fa30f4a1f8ca77ae27e66da3c7f05debec84f821aea3cc8fb1b9aa91
font_02_sfnt_off0000e7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F2 10676 bytes
SHA-256: c32bfed0b718d4b2e53dcb17ad07818bdec5c7ecb847249075f0c90d93d592b1

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