Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25c3ea19aa61ae8…

MALICIOUS

PDF

85.4 KB Created: 2021-09-20 09:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 21fb76ee162a78f6178a657208101901 SHA-1: b422b52dd0c13c4e94a79ff1d4f4077e37d0b622 SHA-256: f25c3ea19aa61ae85904e3546d24bb92a8c747ed684300ce4cad057fc8e923d4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one specifically using a 'utm_term' parameter suggesting a tracking or phishing lure related to 'plants vs zombies 2 purchase hack'. The PDF structure and embedded links point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allytemp.ru/uplcv?utm_term=plants+vs+zombies+2+purchase+hack PDF link annotation
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161437669a5031---kotetabapedofubif.pdfIn PDF document text
    • https://pima-alarms.eu/slicice/file/bexota.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/30159770449.pdfIn PDF document text
    • https://securitydm.com/slicice/file/wotefisizewejibutilox.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/vaxalezogatod.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210919_141529.pdfIn PDF document text
    • http://infinity-c-t.com/userfiles/file/86977658147.pdfIn PDF document text
    • http://erpos.sk/data/files/86644984980.pdfIn PDF document text
    • http://video-cycling.de/files/file/39575755153.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/pomujuwa.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/15699763899.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/18222069500.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/47543134505.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/35245191973.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/90572209394.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/rezupofifetumabuteb.pdfIn PDF document text
    • http://ecole.ru/text/images/file/wiwetesorejoxamelat.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/zujatu.pdfIn PDF document text
    • http://abakus-routing.co.uk/ckfinder/userfiles/files/wupamaxabilikazazikul.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/75504135108.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/jinakiwuporekovonegu.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/92221687324.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/kebesezavewulupisepi.pdfIn PDF document text
    • http://quartierdete.fr/uploads/fckeditor/file/60769114400.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_off0000e492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE492 11220 bytes
SHA-256: 7f1f867e9ed3fd8bb06a684cdc4b5020513583779d8d4834aa92eb79e18e937f
font_01_sfnt_off0000fe8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A1 18772 bytes
SHA-256: e33bcd8aa1aae5ad3c7f2c30f0a658ac6d87dbf4988f33711458dc5475eff2c3