Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb54c24656ddb75…

MALICIOUS

PDF

68.5 KB Created: 2021-09-24 16:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d4c9ecade9c558a0188382543970b6ba SHA-1: 26f1dcc43741af27d89a6cc0a22597d986463687 SHA-256: ddb54c24656ddb75231f306bc60da4c47fffad7f7a332d15260d1faa0bd1c5ae
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('garglob.ru') and a query parameter suggesting a software download lure ('vidmate+12+mb'). The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links to disposable hosting, reinforcing the phishing or malware distribution intent. ClamAV detection as 'Pdf.Phishing.Trojan' further confirms malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://garglob.ru/uplcv?utm_term=vidmate+12+mb PDF link annotation
    • http://drukarnia-skawina.pl/app/webroot/media/files/68626897361.pdfIn PDF document text
    • http://strandedtattoo.net/file/mutowire.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/13431469192.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/82028074956.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/63071309289.pdfIn PDF document text
    • http://esen-life.com/userfiles/file/50304035076.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/nipako.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/8676615460.pdfIn PDF document text
    • http://elskenecologie.nl/files/67393400812.pdfIn PDF document text
    • http://alltechsro.cz/files/lojizuxudasinepumit.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/202192117995948.pdfIn PDF document text
    • http://telektrans.hu/editor_up/jepototiwipotemudo.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/14910833898.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/74797574982.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/bezebe.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/46890611753.pdfIn PDF document text
    • http://krzeptowski.pl/file/56117138319.pdfIn PDF document text
    • http://phamtrangia.site/upload/files/gasuxopedinesoga.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/99879060533.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/laroduraxelelogowe.pdfIn PDF document text
    • http://client.diffuse.info/files/menasatetodizijokezobo.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/8fbb34b18cdeea86caae06224c2d0f42/4472235658.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_off0000ae63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE63 10152 bytes
SHA-256: eb47c936e12ccf50cd22cefeb244a018d0690532e2fb7c15e958f33438a668e0
font_01_sfnt_off0000c536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC536 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD48 15588 bytes
SHA-256: 62df27787fb2f98b4ae7883b78715aeb1d347d8a4cd8975891ecdf81822614ba

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