Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c499f0969c2a6d7…

MALICIOUS

PDF

100.9 KB Created: 2021-07-23 17:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4979e0490a42f47188cd1766aec60376 SHA-1: 870d701d7a24699a19f2f357dcc25d0989e20d71 SHA-256: 7c499f0969c2a6d78a5d6a0d89674dc5604486fc9d4c3be97c85c00cc962ed64
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to mislead users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of multiple external URIs and link farm heuristics supports the classification of this PDF as a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://webelievedin1984.com/clients/6/67/676624d6593aa512bfa6e10e765af00e/File/bejotusit.pdf In PDF document text
    • http://bajcsidavidfoto.com/_user/file/67169806671.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/5081129720.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/59734779616.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/65960666098.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c63759beb44---77281321582.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091044a35579---91072050386.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5ad8156a4---70645240136.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/fibobemesupeguxa.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73a48a6584---24012162545.pdfIn PDF document text
    • http://consade.com/userfiles/file/42245061645.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c695d2eacf7---womawitu.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/5891532162.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/aacrekv4kqcj6ofa265fsjcv57/1413499763.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/46033817786.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af59c9e2561---bimoketagufewejuluziromak.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/192b8845be3e71eddcaa5b6ecccd11c5/vetozo.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/00edc4f07ce2eaab9a0d184a1f53eb57/jeziriki.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0dc71a4e4---duvivapewizusafus.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c9cc2a52a---48099890329.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/nezoxi.pdfIn PDF document text
    • http://wmhsclassof1977.com/clients/34196/File/gujujixironimofidekojakek.pdfIn PDF document text
    • http://skisun.it/userfiles/files/kumikumufidorixemedimope.pdfIn PDF document text
    • http://magnachip.cn/userfiles/file/20210525002905.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=radiation+detection+and+measurement+coursePDF 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_off00012390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12390 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA7 10628 bytes
SHA-256: f4de143f1a8455a0fa9dc369908cafcd6c414483486b92fefd5a1255ce6def64
font_02_sfnt_off000153f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153F0 18456 bytes
SHA-256: 572404e6e6979fa4e83aa2af13ef98ba787adf207210be3798d88ac1dff0ba57

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