Malicious PDF — malware analysis report

Static analysis result for SHA-256 39fae1490826078a…

MALICIOUS

PDF

91.8 KB Created: 2021-06-29 07:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d0dacf5d5878d902bafd6c126751018 SHA-1: d9daaede0d70fbe94bf28a89d023d8184ac79da8 SHA-256: 39fae1490826078a6b56b38b4b64877021fd3baa62890eadae8107cd2fecb820
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00599636fe---31856424992.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608320c7a2bcb---9072705171.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1bf14645d---26268563135.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607580c2bf333---37565579058.pdf
    • http://www.abcklima.hu//data/editorfile/wimigetovowab.pdf
    • http://dienlanhlongan.com/upload/files/26158519813.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/57f155c27ea276e246b810ce73c08ad1/xujiparekemejoru.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55be3dc9de---43231918221.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cc224dc26bf---10762552372.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/754c141d712350cf52604784b726c90e/83589118657.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836d6025d03---20026892954.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/0731d151f38662817e418cabc55a2719/18540329889.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fed6abd05---jodelezejivip.pdf
    • https://salvatoredivilio.it/userfiles/file/34739427624.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099483d5aab7---63293086295.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/b3304fc381070f50c1cc68c238d4a1f6/80619627879.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe01034eee---62650241855.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/2a0ecabcfe4d0e8c44cc787010dbdd23/rogetolu.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160796303ee492---19747597277.pdf
    • https://psfund.org/public/uploads/files/cms_files/mapobefif.pdf
    • http://uro-medical.pl/zdjecia/fotki/file/6548357310.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d08f54eb607---16668399930.pdf
    • http://susutour.com/userfile/file/73845505314.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609db20919953---gitenevovegurek.pdf
    • http://olsztyntransportmedyczny.pl/userfiles/file/76006996370.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084b0f2bebb0---sidusut.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=100+day+water+fasting
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010450.bin
c348c38f247049af6b00b2c346acffeb765ecd7a577a7b404c7c221474ef03e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10450 16988 bytes
font_01_sfnt_off00013047.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13047 16792 bytes
font_02_sfnt_off0001485e.bin
5734362b2fa6d31cb05cc77ff8a72e22e59d3f76d3a16dc9f2a7e9654535f140
pdf-font-stream PDF embedded font (sfnt) at offset 0x1485E 10640 bytes