Malicious PDF — malware analysis report

Static analysis result for SHA-256 96336de5538ea0ae…

MALICIOUS

PDF

84.7 KB Created: 2021-09-05 05:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 74df6415774920c9b4747770b6411ca5 SHA-1: 374e644d11b46840eb659441287f956eff54d22f SHA-256: 96336de5538ea0ae35b328daa000681b842e3e4437b97f47318306fee38b5093
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a phishing or trojan threat. The document contains numerous external links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. These links likely lead to malicious content or phishing pages, aiming to deceive the user. No scripts were extracted, but the PDF structure and link farm heuristic strongly suggest a phishing or SEO poisoning attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://drafthe.ru/uplcv?utm_term=honeywell+thermostat+t4r+manual PDF link annotation
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/fe5g2hta91ngkp1h9v6ifhu6ap/lavikuweduzudameto.pdfIn PDF document text
    • http://homeopathyhk.com/files/14962143698.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b45e5961d4e---zufurisi.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16076e7be49585---14487587168.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210824230811_bik9pk.pdfIn PDF document text
    • https://aedwea.com/upload/foto/88625084121.pdfIn PDF document text
    • https://qigoodteam.com/uploads//files/202108081525204328.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/guxiperoro.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608afb85b64c2---butudawor.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/16842145601.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608887e47c81d---72026408347.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/33593314854.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/ca920d158d5bbadf92e33134aefa7cd4/68134366733.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/41621296787.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161166746070a1---21087976607.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/950c1972b15a61db2cdadbf828bdf791/94082742028.pdfIn PDF document text
    • http://melabo.com/upload/files/34939252192.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859a883d873---jifepasevujuguxe.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/22696481788.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/18630259589.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c861732dbd---60310078576.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16084e2ee52d98---63503060979.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079eb1112b98---56548288727.pdfIn PDF document text
    • 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_off0000e611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE611 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE23 18128 bytes
SHA-256: 8470f68a631cd76168f7c23b5a88df915335c6dbdb5424ad7f4ccaf55d78f45b
font_02_sfnt_off00012cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB4 10648 bytes
SHA-256: 7311730ae11907d48b360144949df547828d919a034d84adbf72444b431606df

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