Malicious PDF — malware analysis report

Static analysis result for SHA-256 0064132437152d0d…

MALICIOUS

PDF

81.4 KB Created: 2021-09-16 09:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 13245f6647b85b566b4d11ccad752926 SHA-1: ecbb8c972008260e8154d02cf5a06672fe03c3b1 SHA-256: 0064132437152d0d2aed303cb40ceb35153439d9361303322d6b5d6430865ecd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The presence of numerous links, including one with a 'utm_term' parameter suggesting a download lure, points towards a phishing or malware distribution scheme. No scripts were extracted, but the overall structure and URL targets are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://pixomot.ru/uplcv?utm_term=download+dante%27s+inferno+game+ppsspp+android PDF link annotation
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139fc061b9ff---99863040163.pdfIn PDF document text
    • https://bakotech.at/uploads/ckeditor/files/98354675694.pdfIn PDF document text
    • http://pet.nfe.go.th/m_site/ckfinder/userfiles/files/79361232404.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210904_A0BF6630105620B5.pdfIn PDF document text
    • https://smshealthcareservices.com/ckfinder/userfiles/files/vexaliwimajetoradukemiv.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/nefuxatudevur.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/kibupisog.pdfIn PDF document text
    • http://yieldpharm.com/upload/files/zaroruwudoxof.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/74850315285.pdfIn PDF document text
    • http://belv.ru/userfiles/file/sojojoxiwipawexefolenoju.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/53692728867.pdfIn PDF document text
    • https://srsatta.com/ckfinder/userfiles/files/86194455940.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/55580517119.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/80338797137.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/widuvafusikukokebefebe.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210905_87148867FB0DE4DB.pdfIn PDF document text
    • http://watch62.ru/files/files/88964521417.pdfIn PDF document text
    • http://www.egymast-segito.hu/uploaded/fck/file/87558398347.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/3vnh12l2f45l6h6j43o9a0dt1s/kebapalolowudilugex.pdfIn PDF document text
    • http://www.ih-consultant.com/ckfinder/userfiles/files/milapirufipudi.pdfIn PDF document text
    • http://z500.si/files/62710770816.pdfIn PDF document text
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/zutusimajikajiditinavota.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/vemumum.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/30771263407.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/09dea5b08caa1ea50af4aa0900bcce3a/37895080477.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_off0000d414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD414 18912 bytes
SHA-256: f8d41d83390e3b1b3b4e05d6db87a39b7ee3780e56107f0c5e94225cf9e6d3e0
font_01_sfnt_off000104de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF5 10960 bytes
SHA-256: 2f53f9129a4ac0e15f877acabf6bde8a7e3d73250fb826d842addcf34ebe0a3f

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