Malicious PDF — malware analysis report

Static analysis result for SHA-256 8867bf8180b9b5f9…

MALICIOUS

PDF

69.9 KB Created: 2021-09-27 02:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e59cf33e62642c3651d277e722afdbd9 SHA-1: 096254f9639beb48110b954af6052bb0532fa700 SHA-256: 8867bf8180b9b5f97b5a4e859f4a5e0cd01743448162544f68baf7d034b7e8ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to malicious websites. The presence of compromised CMS upload links further supports this, indicating a potential distribution point for malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/uplcv?utm_term=fatal+fight+apk PDF link annotation
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/87535c89f1f9bb729cf4de9d2c318c3d/varuvudijuzep.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/45430140147.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/vosimonajubejepuvu.pdfIn PDF document text
    • http://cocoal.com/uploads/file/95399619811.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133555a286a5---dizobutiruloj.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/puramujiduribulibi.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/jurodatenaziwap.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/korafotuxafa.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210914112015.pdfIn PDF document text
    • http://thegoshow.net/userfiles/file/rujemorezaxowezefekebip.pdfIn PDF document text
    • https://alshuka.ps/ckfinder/userfiles/files/fetutanejuwalelelonodema.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/lezozolasep.pdfIn PDF document text
    • https://sydneystudytour.com/accounting/userfiles/file/lijuwufixeropimo.pdfIn PDF document text
    • http://agmapure.com/upload/files/lofuvitarodesoweded.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/91251244964.pdfIn PDF document text
    • http://studioiulianella.it/userfiles/files/femafuximusebixowogu.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/58408353827.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd99d25646---65081863566.pdfIn PDF document text
    • http://agama-rc.com/upload/files/32372883460.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/wajefovalarofor.pdfIn PDF document text
    • http://freetds.net/userfiles/file/vixilu.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/5776658459.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/fbe35b3f446dc74bd8cece9bfc6dd2d7/50567301975.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/78476899412.pdfIn PDF document text
    • http://africalegal.nl/userfiles/file/xonusewev.pdfIn PDF document text
    • https://careerexpo.alljobsinliberia.com/ckfinder/userfiles/files/boponejenejesusikamodi.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_off0000b365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB365 10084 bytes
SHA-256: d324a1a28ce2d6051cf5b7de23d4cf5a63c931dba2cbf4b9616e10444383e7e2
font_01_sfnt_off0000c9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E8 15884 bytes
SHA-256: 41d09cdd38821eb56f9899c8bcb517a712d8f196cfc70062a05cc09642b809bb
font_02_sfnt_off0000f241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF241 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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