Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee033af25a57597…

MALICIOUS

PDF

112.8 KB Created: 2021-09-04 08:10:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: bebd1ab63bfe12595e0fb74214e941e3 SHA-1: 37a3f41676c46e4185891c6c3185675a5eb197a0 SHA-256: 1ee033af25a5759786dd4fccbba5f1a619929db20f134b726c562c613e0edd22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a link farm pointing to multiple compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document's structure and numerous external links are consistent with a tactic to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://anhbanglaw.com/userfiles/file/65879878167.pdf In PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/87254e728f8ce432201c7174ecc92c01/naworuwukipupifafeta.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/tidazabisivomiture.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16082aa04d0b0e---70449315636.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/miduletuxiribanese.pdfIn PDF document text
    • http://bigpictureresources.com/userfilesbigpicture/file/bafuviz.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/ri052j9esurki5oaaqf8lt4rl4/bupulepibirugozis.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9092c86c3---webitubugemewosotijira.pdfIn PDF document text
    • https://ijpdua.com/contents//files/gisasitexet.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/vetabowazatisagorusa.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/9eee9da2660dc40c3ed204b8d3267c8c/87647490643.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/76390bc82acb30f7a678f9ded3529abb/79158522678.pdfIn PDF document text
    • http://na3.it/misc/file/guvatademolefuzowevu.pdfIn PDF document text
    • http://naszymsladem.pl/upload/file/levamewa.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/vetaxagenojunupun.pdfIn PDF document text
    • http://jarosi.hu/files/file/paxomoselukixajiso.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/8bc1bbd26ada633c9b7df17f34ffbd91/gukixujibemivoj.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/tm3a2qrk9f0eheshh0fbru8b71/bokatemi.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/39965b85863f8df13445fa0e8cebc00e/nunisonumoseferaw.pdfIn PDF document text
    • https://ghadir-eng.com/userfiles/files/fuvil.pdfIn PDF document text
    • http://namngonviet.com/user-/files/wuwukovivafob.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/ganosesogolexororunijuno.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/94297577.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=application+worksheetfunction+clean+vbaPDF 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://www.mvps.org/dmcritchie/excel/strings.htmIn 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_off00014d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D85 11040 bytes
SHA-256: a12e00dbc986e1f446e7379454f1329b5a9cc90dbd4dd5f51ad6cbc3a3455af9
font_01_sfnt_off00016719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16719 19788 bytes
SHA-256: 43dd5dc282b63ad640513e93c494330614949151cd3857a25cfa79488467076b
font_02_sfnt_off00019b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1