Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f6301c0f1ab89e…

MALICIOUS

PDF

82.4 KB Created: 2021-09-21 22:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c10897e2a58ec9624ebae47900a1db85 SHA-1: a106ec48bb86eeb3778732d680cd3857d33b4a57 SHA-256: 30f6301c0f1ab89e929232feaf7aa830442a289223dd01e39924c9f26252a0bf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. The primary URL suggests a lure for downloading game software, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=monster+hunter+world+apk+download PDF link annotation
    • http://hongdacable.com/d/files/86669624961.pdfIn PDF document text
    • http://gzperson.com/uploadfile/files/92058962570.pdfIn PDF document text
    • http://ellev.fr/upload/files/zerumu.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/96938630460.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133daf8b114e---82595764119.pdfIn PDF document text
    • http://nhanvietgroup.com/demo/xay-dung-tnx/upload/files/norozoxonifogakudomap.pdfIn PDF document text
    • https://pleasanton.com/wysiwygfiles/file/91108272635.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/nijidisad.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/13c8e35e3aace4d2d631da1a5f80c442/85379365502.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/49109524783.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/3866539466.pdfIn PDF document text
    • https://specializedfacilitymgt.com/public_html/userfiles/file/xufidawufonamosaxalitiw.pdfIn PDF document text
    • http://wlpp.net/images/blog/file/xemajig.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/ninud.pdfIn PDF document text
    • https://netlandschool.cl/files/xijowilapigipo.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/kelefididuronuzivas.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/49194473632.pdfIn PDF document text
    • http://sswjeans.com/files/18932238121.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/54b5eebf9e46bca08f26f21ff3f9937c/sagukixunenaberevalimog.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/bedevupuvota.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/pomudok.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/86131728342.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb4257f89e---zufemokilopamurom.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/xekolevovak.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_off0000dd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A9 10668 bytes
SHA-256: c67ebdbfcd07a5a59ce518707970b6ee5334f8f1e8ed5d02c8ef1c390502ba23
font_02_sfnt_off00010e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E21 17716 bytes
SHA-256: a6049223474cdea45241de7556a46926fb35d3eba7a2ab57bace4529460fe2e5

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