Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69051f9877d350b…

MALICIOUS

PDF

79.1 KB Created: 2021-09-02 05:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9c3880afc8597b13481f75e83afbd337 SHA-1: 7db5694cb3f3c4b223fe16c44d1efd70b4cc3618 SHA-256: f69051f9877d350bc208da7378d309854824e59f4d5c2fbee237b9dd07877411
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that likely lead to phishing sites or further malware downloads. While no scripts were explicitly extracted, the PDF structure and the presence of many external URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://inwebjor.ru/uplcv?utm_term=dull+ache+in+left+arm PDF link annotation
    • http://mispuntossaga.com/campannas/file/55961163068.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdc0fc9f51---losufunafetulilavukizigi.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/dvcttg048es69biitten1nr5da/24585424543.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613036c6c7dcd---weronifapekagejifasebuvin.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/nipomigapadig.pdfIn PDF document text
    • http://xinyuemu.net/assets/202108/files/20210802205722655586.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/33894308605.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/bubuzawokutogobo.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/dapeletaxomifesoxozadide.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/sefevinavivik.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/wugupagifelitazu.pdfIn PDF document text
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/24093477656.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/490010263eae461f488825a4f6c9bd76/bigavixodonojakabapopuvak.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/9262264494.pdfIn PDF document text
    • https://orrizon.ru/images/file/1811686778.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b6cc48dbc06---romijogusemapixupix.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/csttcd8cs1m69ab8oqmobeujqe/megad.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/wevibuwuju.pdfIn PDF document text
    • https://fisheaglesafaris.net/pics/user/file/jiguru.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a611100a056---6247151289.pdfIn PDF document text
    • http://pro.ovh.net/~tribuene/images/banque/file/ludevaduwet.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_off0000d244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD244 10412 bytes
SHA-256: 7beed870bd887da4ad39170535877d37aada5fedcdb5d13428508d7f4166c2dd
font_01_sfnt_off0000e9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A1 17620 bytes
SHA-256: 4d0bd4bfcb12df392daed3a41f3a12211498499f0322306f4099102d42b28bf9
font_02_sfnt_off00011716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11716 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1