Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc6860e3f1d1b19…

MALICIOUS

PDF

82.0 KB Created: 2021-09-17 12:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e7674cb69a30ee2007cc3c987ebc2b91 SHA-1: a571bf8b40411ea93a63105682fe22b41c795075 SHA-256: adc6860e3f1d1b1974f200e9b1204d92fc4c682dfa1e6deac7b97004b6c740f0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious PDF files on various domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://gaestehaus-am-erlkoenig.de/img/editor/file/26332643113.pdf In PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eea3f6c18c---tizumewebuj.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/rumigajosidurapuf.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/58f240138cc194a659b8714e326e4953/xilubizomorod.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/68682961827.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/94028033607.pdfIn PDF document text
    • http://benly-carson.com/product/files/tezatovop.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/mogugisasasamuxudox.pdfIn PDF document text
    • https://whereestar.com/marinarubicon/admin/file/diwozulojijoboja.pdfIn PDF document text
    • http://gptools.net/userfiles/file/kojuwipafiniraz.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/62007324744.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/53803807848.pdfIn PDF document text
    • https://cemb.ca/upload/editor/file/34218595420.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/81713657209.pdfIn PDF document text
    • https://xn--23-6kci4asohe8k.xn--p1ai/userfiles/file/59047151703.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/mupanikiwedorefabizewo.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/vivosabasipaxanitopodosal.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/17880180993.pdfIn PDF document text
    • http://xn--80aafbladvtgxneccoge3bt.xn--p1ai/pict/file/jamojofukatazaza.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/wejenazonemalaluzowota.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/13842486170.pdfIn PDF document text
    • http://tko.wavedev.net/img/files/files/rukafawakabodowevawa.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///13332993470.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=cute+text+symbolPDF 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_off0000d27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27E 10296 bytes
SHA-256: 63bb65d8b4932a131816b57e31fd38bca8ccfd61cd71e695a5df6b90f1d39e0e
font_01_sfnt_off0000e9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000101ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EC 21860 bytes
SHA-256: 6e4695b15d82e9dbc88d126acbb3a9c592395b352c2064cd1960929dc919a62f

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