Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e456f7024d57109…

MALICIOUS

PDF

83.4 KB Created: 2021-09-08 16:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: d6b0cebdcd0c59a73add646dc93c4fbb SHA-1: b4209f215403420105ba12947385a5eb53e4c758 SHA-256: 6e456f7024d57109d49c25a759329b47dd20dd232069334da054c893a17a78a4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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 http://ptaki.info/imgekoprojekty/files/zebizadabakagid.pdf In PDF document text
    • http://szentdorottyapatika.hu/files/95113785497.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/domum.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/724651803.pdfIn PDF document text
    • http://nfc.soo.jp/file/rakativejivopipelixam.pdfIn PDF document text
    • https://dolphinsolutions.net/ckfinder/userfiles/files/69057845615.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/madilunemiwujujeboniror.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/19796258016.pdfIn PDF document text
    • https://ptogel2.com/contents/files/82528376005.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/55631582356.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/16293368646.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/24373032013.pdfIn PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/43631603632.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613697317f96a---12130408743.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/24965309320.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/36095638665.pdfIn PDF document text
    • https://valstybestarnyba.com/upckfinder/files/27304378044.pdfIn PDF document text
    • http://boki.hu/editor_up/87296186744.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/61712995276.pdfIn PDF document text
    • http://bastola.org/userfiles/file/mukezevi.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/gesow.pdfIn PDF document text
    • https://livre-d-art.com/ckfinder/userfiles/files/78908751450.pdfIn PDF document text
    • https://salondumariagededijon.com/userfiles/file/63193068823.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=black+skin+white+masks+review+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD73 11064 bytes
SHA-256: c4875be09f7ac0983bf4b0f1b8e9c2d799af3308eac7f257c3221c688aa8f7c8
font_01_sfnt_off0000f716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF716 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F28 18720 bytes
SHA-256: c6eeed363d4a3e334411a655dfe87784e99a5fb362a5978b7ad3141f265fa5c5

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