Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c2bb5669037fde…

MALICIOUS

PDF

77.3 KB Created: 2021-09-12 23:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0b40ad565a66da8996efa7ed938ae3cd SHA-1: bc5e0f8117a570d8892ff3f452b90101060c307e SHA-256: 79c2bb5669037fdeaa6e4a43c5b9ad3d35f976eb1d3e25fdfe83d7d457661946
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous distinct domains, one of which is directly hosted on a potentially compromised WordPress site. While no scripts were explicitly extracted, the nature of the PDF and its embedded URLs suggest it is designed to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381e0e4492e---gajusebidub.pdf In PDF document text
    • https://krainaogrodow.eu/zdjecia/fck/file/68505088445.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/71399120009.pdfIn PDF document text
    • http://creationart.hu/files/file/57892077795.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/39452248814.pdfIn PDF document text
    • http://scpt.it/userfiles/files/48583802919.pdfIn PDF document text
    • http://savemaxint.com/files/file/24643999109.pdfIn PDF document text
    • http://akekaluck.com/ckfinder/userfiles/files/88079268732.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/46538181603.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/zevivalug.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/pupitujegajopawun.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/18380485760.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/zonomofojovewijeji.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/guvuvedotalagetosaruwut.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/18415723998.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/betemegobabajofi.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/95116298676.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/67816578289.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/27936125012.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/totejojemepogabugudubide.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/remig.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/mavamuno.pdfIn PDF document text
    • https://iqrainternationalschool.org/_assets/files/22789166240.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=worksheet+of+nounPDF link annotation
    • 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_off0000ccc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DA 17212 bytes
SHA-256: d6e26e88a594d40544dbb8501193e442c083887e1e0a16ca669d7f7d9bc86689
font_02_sfnt_off00011129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11129 10196 bytes
SHA-256: 9b3025165faf4ee051d5f0664075d64aff03c14ce1d15e2e03d3df79bce0ad8c

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