Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3215657a9cad734…

MALICIOUS

PDF

84.7 KB Created: 2021-09-11 17:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a8d1ad6869a246cd3f1409c5ec715608 SHA-1: 51234afca56b5759eca25a3f1fa39a502b86e504 SHA-256: f3215657a9cad734e83c55415bb75c85d866a4b38d0e18a3eb5b1ca43ab2568b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to other malicious sites. The PDF structure itself does not contain executable scripts, but the embedded links are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://smidgel.ru/uplcv?utm_term=real+cricket+17+hack+mod+apk PDF link annotation
    • http://evergladesharvesting.com/ckfinder/userfiles/files/41698886343.pdfIn PDF document text
    • https://mklaassen.nl/images/file/kokowujolimolosaxefago.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/0b5ba121bddeed04055455fab4aa8116/nigafuxofakisewulazutak.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/nusixifogefofugaz.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/fekifamiditusikixu.pdfIn PDF document text
    • http://kraemer-duennebacke.de/files/file/rizumedewonugesaboweki.pdfIn PDF document text
    • http://phongkhamthienhoa.vn/images/files/lugemovowaximuvadav.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/74844441124.pdfIn PDF document text
    • http://bushurov.ru/images/files/nefojolasevibezow.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/60891001517.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/36889557314.pdfIn PDF document text
    • https://datajournonepal.org/files/wetepifixubidutuxet.pdfIn PDF document text
    • https://oolong-dining-co.com/webroot/editor-uploads/files/gigatusisapoxupaluleke.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/68420037867.pdfIn PDF document text
    • https://pbpkrosno.com/fckfile/87057798199.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/23859725362.pdfIn PDF document text
    • https://ritascreation.com/userfiles/file/85014503094.pdfIn PDF document text
    • https://pro-biomed.com/admin/userfiles/file/zoruduzilevufog.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/tajedifesorawalus.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/40800885249.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/49089649780.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f328389db3---fupajageruxakagi.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_off0000e338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4F 10748 bytes
SHA-256: 96229a91fa6a5ba5b2be8bbb08927339213ee60db83766d3add966ccb5bdcb72
font_02_sfnt_off00011413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11413 18668 bytes
SHA-256: c402403467abc2966b0aaafd43b8543f758ac4b3fcedd0ff8f721f466033efb5

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