Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a09bfeff5f11552…

MALICIOUS

PDF

93.4 KB Created: 2021-09-16 17:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 50f996aa351d59a17a424361379b2870 SHA-1: 5d12630aa15b1c9bae779abbf8661dec777f9c4d SHA-256: 0a09bfeff5f115529829f6766f61d3b068d62eb60c72bdf6b69f67b0af8f1f26
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which are part of a link farm, suggesting a phishing or malware distribution scheme. The presence of a URL with 'minecraft+full+version+apk+on+android' in the query parameter strongly suggests a lure to trick users into downloading potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://ketchas.ru/uplcv?utm_term=minecraft+full+version+apk+on+android PDF link annotation
    • https://karpzbeldowa.pl/uploads/userfiles/files/3446960706.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/23299754764.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/kimebobaju.pdfIn PDF document text
    • http://186086.com/upload/files/4959653448.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/51657953950.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/13541372145.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/30067974137.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/79530069881.pdfIn PDF document text
    • https://adikkedua.com/contents/files/86027430378.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/lixesazonipuxizawogoweneb.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/tizatefipek.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/77827952446.pdfIn PDF document text
    • https://medbioplast.com/klucharnet/images/file/63402941562.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/94358491435.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/tejuwiwamiz.pdfIn PDF document text
    • http://xsteelstock.com/d/files/buwudokokitatoke.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/wamewuwunafinopave.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/38732370094.pdfIn PDF document text
    • http://domario.ru/userfiles/file/91751004168.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/48370002259.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/37609836715.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/34811662870.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_off00010640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10640 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E52 18472 bytes
SHA-256: f9991296e2cc7ffb2abd7c1a8f8fe1142344d1f052e7837d300bcf1a6c374923
font_02_sfnt_off00014ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED5 10864 bytes
SHA-256: 797849823c17688eb71f36ea69ec85648dee68c624106dca317096725172488e

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