Malicious PDF — malware analysis report

Static analysis result for SHA-256 114705051448b9d7…

MALICIOUS

PDF

74.1 KB Created: 2021-09-16 14:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f2dbc054f6e684f7f78f17a47fb061c7 SHA-1: a3d5d2e4d7d0668e4128d2fe4c826d29c36cf3ef SHA-256: 114705051448b9d788469f2a0ddf8c00e86f4350767ac2c469e24d791c7317f9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains a link farm pointing to numerous URLs, several of which are hosted on compromised WordPress sites, increasing the risk of users being directed to malicious content. The primary attack pattern involves tricking users into clicking links that lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pinzimoniofiumicino.eu/userfiles/files/97356257197.pdf In PDF document text
    • https://maydangson.com/vietkiendo/upload/file/22223525668.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f504916b94---detufova.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/baperotuvemigoteluvonowi.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55787113586.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/1997658222.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/63016631656.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/26144935108.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/kuborilexan.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210905223005.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138577ae5af7---zibogugore.pdfIn PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/xilegupafebijojiremomuj.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d7c41c87a---zabirosifevedabi.pdfIn PDF document text
    • https://chulintemple.house-well.com/CKEdit/upload/files/rubofuxamokijazamosuloze.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613d4123b3561---22179002748.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16140306d6feca---8862605847.pdfIn PDF document text
    • http://eternaseguros.net/files/files/41576207078.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/62039780793.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/97076486016.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/81129067186.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/vamadiniwebolosazimuk.pdfIn PDF document text
    • https://artedelvalle.cl/gal/files/file/30286576728.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/040311438581.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=american+horror+story+hotel+watch+freePDF 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_off0000bd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AE 10784 bytes
SHA-256: 99ae20babddaf22a21e463dae67844fae025ef7f1a90290110f754aa87867ef7
font_02_sfnt_off0000ee66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE66 17056 bytes
SHA-256: dd03ba3e184f6c32ebb8a42fb78efdd4cf652ffebd7595f1cd245f9f550b4a75