Malicious PDF — malware analysis report

Static analysis result for SHA-256 2baa15b7a8fc55e8…

MALICIOUS

PDF

70.2 KB Created: 2021-09-26 20:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e444bd64cbda35339c36017d06e1f571 SHA-1: ca1724a490fd65276248e91da6d43992f2b6cf41 SHA-256: 2baa15b7a8fc55e84e685f7693fdfee8647b127b3c46cc5e4964741fcf3bac0e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous embedded URLs that point to compromised websites. These links are likely intended to lure users into phishing scams or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=android+not+getting+text+messages+from+iphone PDF link annotation
    • http://sanalights.com/admin/admin/uploadfiles/file/rejijagewopugabarak.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/1e43d16e59dadaea37d35e941f4aad7d/60531193120.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/1075e4478a35b055c8691019f4bb7175/38090160477.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/31320031299.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161436c14e009d---30626535765.pdfIn PDF document text
    • https://lacgl.org/upload/editor/file/70926517009.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/5514d161baf2c4efc17143b5d5523b32/wadolenasisuxotigodukume.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/tukegezenekesetejidupupe.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/31054300701.pdfIn PDF document text
    • http://orzo.cz/uploaded/files/kebekipowodikobegenanenir.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/24625088696.pdfIn PDF document text
    • https://es88.tw/pro_pic/files/vimuvesuzoraguruwuz.pdfIn PDF document text
    • http://tichdiem.surecare.vn/uploads/userfiles/file/nokijakezexumebavo.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/68149318647.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/74107315859.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/dorefijisafapi.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa143b18a4---kabuwumanojevenis.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/tofedazetopidufokofor.pdfIn PDF document text
    • http://bolt.fo/public_html/userfiles/files/jikanedo.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/dizugemigomedo.pdfIn PDF document text
    • https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/98117388815.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/varekijusafipavezewenipe.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/49974995907.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_off0000b0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B1 10984 bytes
SHA-256: 998c019ce8334bf657fa235d0753d7e4b7d51c99a1cdc687144bde878f7e2420
font_01_sfnt_off0000c9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D2 16240 bytes
SHA-256: ce06866062c5876475e572142ab5a26db93f7967326cca8f2bed771bec5d0a80
font_02_sfnt_off0000f35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1