Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d4c80d49b1e4ce…

MALICIOUS

PDF

83.7 KB Created: 2021-08-26 06:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 845d315a97cc6402aba5d29a687e4516 SHA-1: a553cf6cbc3baec9bf5e04149d7a069bb5fe2edf SHA-256: 89d4c80d49b1e4ce6ca627e952fbbb354de7b3350d3d2a7bff2317d3ffc25776
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting an attempt to distribute further malicious content or phish for credentials. The embedded URLs and the nature of the heuristics strongly suggest this PDF acts as a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/e35f3f5fce4ee1d4eeb456bffa83c020/18124913011.pdf In PDF document text
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/pegabigevul.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/74483056202.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/niwesuzufivuvetiputeviw.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/jgqqlgceaaslsfepff3jhp3mh5/jopulexukawetamedalepatoz.pdfIn PDF document text
    • https://akconta.com/uploads/files/81288370452.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/25925867402.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/19ae6cac851bf657a44d2172b56c5086/tuxal.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/ruwofu.pdfIn PDF document text
    • https://ecoledesgourmets.com/userfiles/file/27200358620.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/tegovo.pdfIn PDF document text
    • http://kodemari.info/data/files/83149551229.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/84477965770.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e4d9862cc---69380050315.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afe23ad225---15591299308.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/mekakegaf.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/416a41a8e06b549a300c5bf220481def/xejobenadiwipumanari.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/vatiguveradefesofomes.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/25376079947.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/bezimojotonax.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/88382458791.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa6614812d---dotiderusopitilabanak.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079804025dd5---xivim.pdfIn PDF document text
    • https://gogreenonline.net/userfiles/image/fckeditor/file/86222182543.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c446736b425---zazapifosubavisut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=ny+real+id+requirementsPDF 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_off0000e4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD12 10628 bytes
SHA-256: e946f8ab824f4133139666a60b1834d0333f3dab64580f3cc8a63260a6df35ff
font_02_sfnt_off0001151e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151E 16176 bytes
SHA-256: f1705ff651ff5e47533f6d581f1a6de36f139ba617c87d5b75cf82e4c7f56691

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