Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d050413b957cf5a…

MALICIOUS

PDF

86.4 KB Created: 2021-09-11 12:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3faa27a0027a22c9b3ce9876e6eaa5c0 SHA-1: 07d921a4200f75ca23ef484e84759b166cfabf86 SHA-256: 3d050413b957cf5ac66a2c3ac96ae1ae92c5c4d076758b2ecebbe69c25c955e5
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs, including one pointing to a raw IP address, suggesting it is part of a link farm or redirection scheme to host malicious content. The presence of embedded URLs and the PDF structure strongly suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ovistar-dz.com/ckfinder/userfiles/files/sazesarasoxobotuw.pdf In PDF document text
    • http://art-ball.net/files/file/wolivemaka.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/36063718803.pdfIn PDF document text
    • https://cs-nippon-cp.com/mailmagazine/upload/files/buvoxopiviferomatok.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/gevamixokekenawelogiwowo.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/48313457125.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/50782221594.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/202193_145811_456.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/23131750008.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/givamor.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/161379489d3601---redenumagurodado.pdfPDF link annotation
    • http://www.hgbehringer.de/img/files/files/59211169660.pdfIn PDF document text
    • http://peetersinstallatietechniek.nl/upload/files/duwivuvukeruxerufebutepu.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/60643521888.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/69168815516.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/3216764007.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/36835914763.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/zolunuxugapagid.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/viropoponudis.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/xodeluziwupinoraxusejis.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/vebugezovilifab.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12311771229.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=unturned+lamp+idPDF 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_off0000e667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE667 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7E 10372 bytes
SHA-256: 51f09b48c285447786639c3a1e10e760f8a8d3b2bc3fae61f154e2df6f870643
font_02_sfnt_off000115d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D6 20300 bytes
SHA-256: 64326ec4a2feb26118faaf7fe4e4df26619799e2ae0b942937fcb3be5d231a5e