Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dcc94605098029…

MALICIOUS

PDF

79.2 KB Created: 2021-09-11 01:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c09cbaa1d43ba48fe6e7713d001fd4e0 SHA-1: 880c2cbc29af789c559be6dd4e417eefac0dbad9 SHA-256: e2dcc94605098029ef62ac4e511a8ae6154ad57160df411afd4f16cd0c11f13b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous unknown URLs suggests a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://warmistore.com/userfiles/file/88509467240.pdf In PDF document text
    • http://dopuskvsro.ru/UserFiles/86726075464.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/74433554288.pdfIn PDF document text
    • https://webmenuplus.com/images/file/vegesuxudarulesupuniduba.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/kunolanibupisuravevufono.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321ba14a995---vuziruxareperizuba.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/koraguwarufotamo.pdfIn PDF document text
    • http://szjg.hu/images/file/rowenemesazesuvutogalibi.pdfIn PDF document text
    • http://clingac.com/d/files/wagenawur.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/16925404918.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/92105925241.pdfIn PDF document text
    • http://www.cottagegrad.ru/files/file/derimijimedojosuje.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/44724385229.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/bfcdd8be268a11ba09e0097c5ac5224b/60637073166.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f48028c1fb---36242244259.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210909141017.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/98558521687.pdfIn PDF document text
    • http://bojovesporty.cz/userfiles/file/17051948964.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/nolinovolijutewomu.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/mabegotevixezore.pdfIn PDF document text
    • http://otworz-biuro-podrozy.pl/userfiles/file/91011677093.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=which+is+best+for+android+app+developmentPDF 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_off0000d13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13F 17372 bytes
SHA-256: 72d430e5fcd3ddd28d0b731fcdfeb793ffd2f5ada15582011b835d4dee81fdd0
font_01_sfnt_off0000fde6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FD 11084 bytes
SHA-256: c131f55b79edc798dfb18a8a05496ab4139985ad8d716dd6598fdb3ae1ed5647