Malicious PDF — malware analysis report

Static analysis result for SHA-256 50eef87dae8eced5…

MALICIOUS

PDF

81.1 KB Created: 2021-09-09 04:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: eefa4473cf13f9b01a05fda5280c2a8f SHA-1: 0079198c68d0a541cb0de246b3cfb46f11ef6479 SHA-256: 50eef87dae8eced5cebe7239fec74642f07f8f304d3f05d3484945582c2c1f5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites or disposable hosting. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging strongly suggests malicious intent. The embedded URLs are likely part of a phishing or malware distribution scheme, aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://princeworldwide.com/multimedia/userfiles/file/faxal.pdf In PDF document text
    • https://maintogelonline2.bet/contents/files/11202608420.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///64665265068.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/21107717d0c1f8994e74720e7569f9dc/tisazefo.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161305794f3a0b---32792933333.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/lativikitewipinuvegules.pdfIn PDF document text
    • http://tcihk.com/userfiles/lukejolexonevonimoxiru.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/fijokokazedanajefuv.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/70363032378.pdfIn PDF document text
    • https://alaqart.atelierleuthold.ch/userfiles/files/xesexajudojipupeg.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109090431543541.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/kisupiwixodolix.pdfIn PDF document text
    • http://gyn-ordi.at/myPix/file/51777223073.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/61699729228.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/51834368989.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302ebaa9e33---28284478037.pdfIn PDF document text
    • http://runbo.net/upfiles/files/1631103676359.pdfIn PDF document text
    • http://bushurov.ru/images/files/94344333051.pdfIn PDF document text
    • http://boldogelet.hu/media/54618745136.pdfIn PDF document text
    • https://novinfasteners.com/userfiles/file/29269827340.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353eb36943d---49886071196.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/96862644071.pdfIn PDF document text
    • http://wxbeimei.cn/upload/ckimg/files/202109051926252869.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=cashera+app+downloadPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A5 17872 bytes
SHA-256: fb9e623ad4c085ba93ab87e773361586374b6411d5cea362d783be5e2115a183
font_01_sfnt_off00010746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10746 10416 bytes
SHA-256: 16553e6103334bcb6118382195072a784bea4932d4e01bc00dcc71293290777c
font_02_sfnt_off00011edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1