Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2cf0acc1fd47ee…

MALICIOUS

PDF

86.0 KB Created: 2021-10-14 09:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0daed0a5ee1cfb0eab7a5902b821ddf7 SHA-1: c2304cef0f495a2c807ef3949807c43421fe3082 SHA-256: ed2cf0acc1fd47ee1fd458f1c172c81146d3e7cbc5373bc14874c9bc577652f3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to disposable or unknown domains, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://broadviewlibrary.org/uploaded_bvlib/file/pavubonirabog.pdf In PDF document text
    • http://sb555.com/photo/file/sovofajojo.pdfIn PDF document text
    • https://www.domosystem.gr/ckfinder/userfiles/files/zotokazegobobuvojavav.pdfIn PDF document text
    • http://eternalcycle.com/FCKFiles/file/muguzit.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/robudumi.pdfIn PDF document text
    • http://adveotec.com/img/file/wugutametiw.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/21740905387.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/riroraniruvit.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/zojogedewebonivomivevarok.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/519360172.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16147b065ea163---xomokovobanovavelamaware.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/11795834586.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/2602198828.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/deraxe.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/pediforuvetexibumuvekapij.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/bepuwozipovuto.pdfIn PDF document text
    • http://odra.cycling-recycling.eu/imgturysta/files/lofot.pdfIn PDF document text
    • https://www.hkfew.org.hk/ckfinder/userfiles/files/61140430211.pdfIn PDF document text
    • https://giyimkent.formenemlak.com/upload/ckfinder/files/kifuju.pdfIn PDF document text
    • http://webantikvarium.eu/tmp/bubuzopetavafesubigupilur.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/18744310699.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202110061134441534.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/xesovatepezatun.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/raxeri.pdfIn PDF document text
    • http://www.520amis.com/upload/files/39390982275.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/6969136835.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/tgwjJlsMqHc/uplcv?utm_term=love+covers+all+wrongsPDF 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_off0000e5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B7 20420 bytes
SHA-256: fbc77b9fe73ff52279bafd3365e691454de79d34823358ce2bd40ff2ab9eb100
font_01_sfnt_off00011a7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7E 10324 bytes
SHA-256: 79d5d85fa25729d7b3e4f8e089f51de23b28bad404996c6bb7c2d74eefe87a55
font_02_sfnt_off000131ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1