Malicious PDF — malware analysis report

Static analysis result for SHA-256 122a119073cd016d…

MALICIOUS

PDF

77.8 KB Created: 2021-09-01 02:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d63826260c639950374fa493606033b9 SHA-1: 6c4374b4b011037e2b8f43f841f51ab2114e608f SHA-256: 122a119073cd016d1d48907f12a2164415062b1aafe90841d6cd1218db764675
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The PDF structure and embedded links point towards an attempt to redirect users to potentially malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/rrsblldke2fou35vt6gjb35d8f/domepesoj.pdf In PDF document text
    • http://avision-italia.com/userfiles/files/99250263085.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074abf1d32ea---xasapuzamirugabubifivo.pdfIn PDF document text
    • http://nietegeleuve.nl/cms/files/matufikakesixaxuwu.pdfIn PDF document text
    • https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/wunag.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/80532066208.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/37873d20a2551f10846fde61a8cd7d0a/55602432798.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a172682c0---zowijegas.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/40044808460.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/lojotilejixosufegugasadig.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/45581526620.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/2fme88v0fq4ebp1msck88239qc/70395539796.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/76420412765.pdfIn PDF document text
    • http://kwartetproforma.com/userfiles/file/8301994178.pdfIn PDF document text
    • http://www.beautyvogue.ch/Files/file/xegagasuwuboxi.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/xolamivugiwo.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/sosunutufimiwowewav.pdfIn PDF document text
    • https://zzwgjx.com/d/files/jedodefurumakinak.pdfIn PDF document text
    • https://rosycaffe.com/file/16362073576.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79f20b52e6---30254635201.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/vifizedata.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/nemapoxagogusewokodel.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/lukesibenakotil.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/env11lv03d77ge5p9utt71vnst/32098365758.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/55504617996.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/2285388935.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=contact+lens+papillary+conjunctivitisPDF 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_off0000cbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F6 17148 bytes
SHA-256: 391b0954a37d619addd31ee24c7334641d562aa7a10014eaa77258412ecab325
font_02_sfnt_off0001103e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103E 10808 bytes
SHA-256: 5554521e8626952a87f48ae83bad96a9f3d9fc830e8426443c09e89b0175cb90

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