Malicious PDF — malware analysis report

Static analysis result for SHA-256 0230b070eed442db…

MALICIOUS

PDF

86.4 KB Created: 2021-07-04 13:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 436c14ecb72f56e5d5535ec63d90f768 SHA-1: 2264415fdc4964b90d1a60745f79037f4f64d8c1 SHA-256: 0230b070eed442dba12b8fdc32581b54ce08899de2d8ad5f9ee8d3dfee73c489
96 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, which in turn host other PDF files. This behavior is indicative of a phishing or scam campaign aiming to redirect users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • 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://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/8fcc16f92a17a4e4b8214abe0b96ad2b/59415312186.pdf In PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bef36161af9---zabidejeg.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/20366463016.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/8892617ed0e3bd1b09fad4063349a717/55063160832.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/9f88582b2f553d6f28e06bd51af16c2b/90415790436.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0284a75669---xupilojil.pdfIn PDF document text
    • https://go2germany.ru/files/file/bixajeritevenavik.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/6n29t0kh5bt6gv2p53rjhn75oc/binekawolutozobapufomot.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/1f89gi0r3dtcsv3m4qd6h315e5/siwiboratazaxotixit.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/35742265258.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/4f00a3c0386465f3a898140a54a2d510/99673178766.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/be03b2bdb9031d48a9321cd3d837e36e/65684170987.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/fpl9nefkbg6auajpl2lqevddju/wijinonixokiwob.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/fujaguwobu.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/vpmrp6dm3iqkm8ed0anhodrr47/bozosolalil.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/fa0420d64e4c4b6c2021be0fdb2f3962/vonoporijazesoxuxa.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/sevikosemonapolevuxivulaj.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/91486423585.pdfIn PDF document text
    • http://austintownfitch1980.com/clients/879833/File/89877072665.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/39292461429.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883a2e76591---78371665893.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/6m2vakls2lermbvm36emr35ur1/xidodoviwedajowagitaluk.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/18220919357.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=inductive+reasoning+math+definitionPDF 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_off0000ea25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 17964 bytes
SHA-256: 264c7c01146455a6bd4a4bee06107878db0e7882cb2a1ad0ac9fe05e16d09461
font_01_sfnt_off00011978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11978 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001318f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318F 10992 bytes
SHA-256: bb59d74c34ace1cd4675d2f78bda42308352687a05c9f6db4dcf3b51c1f64379

Open this report in the interactive analyzer, or submit your own file for analysis.