Malicious PDF — malware analysis report

Static analysis result for SHA-256 33fad196bd48475d…

MALICIOUS

PDF

72.2 KB Created: 2021-09-07 14:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4a58649ce346ae9651c8e448e8e62884 SHA-1: abe74c6f83496eefc56ed489c92071ab58dddcfa SHA-256: 33fad196bd48475dfb7ead4e3991612731bd195eb142811ffa6d456bccd329b3
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicative of a link farm used for malicious redirection. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution. The structure and URL patterns align with common tactics for distributing malicious content via seemingly legitimate but compromised web resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/fd318a714569f2269adfdb93009dbcbb/19530732201.pdf In PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8641c23b2a6edbc10b1a632c3fbecc7d/63358071622.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/4805722430.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/96497490738.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/235301e546e59a955e97f3c86dc711c7/tagupoxirigurenazi.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/52258537878.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/3d9304c00aded13fe6e2edc4001cf0fd/zenirumetovuxexojegike.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fa896aa04---najalutotopufole.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fe5fe046cc1---3616666825.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210430151755156.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/96309233145.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/34219712469.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/88784397405.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/lubivelenexolepa.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/19802733483.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/e4f36f87ceb1e4790621bc5991c0aa74/3854292322.pdfIn PDF document text
    • https://mabuksusu2.com/contents/files/37591678118.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/9kojg8j414h0s0bgpdoj6rbbge/96451084972.pdfIn PDF document text
    • http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/bolafopanejawabavog.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/30qran15n9174i7ddapfu58gf7/wasabix.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887a40205c4---44583100116.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/7cd4d61c98ddc4174137ddbbc2cdbad4/66532496214.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=tabata+exercise+pdfPDF 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_off0000bc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC19 10548 bytes
SHA-256: 18dcb0d8dc2a6df03879bed5427f7bec20dc3efad7883950dcb074a0c6b7b23e
font_01_sfnt_off0000d421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD421 15600 bytes
SHA-256: 881f3f9957cc60d0aab3a6ed5178eda20420a644b256462000b7bc87f8e32e64
font_02_sfnt_off0000fbb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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