Malicious PDF — malware analysis report

Static analysis result for SHA-256 5655382e88faf032…

MALICIOUS

PDF

87.0 KB Created: 2021-06-28 16:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d172935c70194a012411cc2dcc1948af SHA-1: ccbbfe88691916fef299ba84caf3044ac34236e1 SHA-256: 5655382e88faf0327c976e46f67245c2aac3c589b571460db2f1432ff7324042
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be acting as a link farm to distribute traffic to potentially malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769b9c3c900---18306055990.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/e6fb687f6cd49f4403ef1cf980040c62/webadivezukijopusuje.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/3792635def641a347b4c56a7c4615295/50972577250.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160866e880a026---jawidimelab.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc56f8ae891---69833258436.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf89b488878---74100166557.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/2807d3debaa31e66a41c94058a7ce52c/13837950823.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/4a6559aaf5eac81c5b84d8f923359358/vivasuzuvirugusukarof.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/97ed5477941a5853ce87f84f0a2442ea/megekejuwave.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d130fb1b6d---13539043694.pdf
    • http://liyangah.com/Upload/file/95921283079.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a02971b0626---komituzemapepifoz.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b070a02e13---20897431077.pdf
    • https://ideylia.fr/uploads/file/jagerugidakovexixugi.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607768b0cfa69---dijidu.pdf
    • http://www.halpellet.hu/userfiles/files/31294975843.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e5057bd62---duvituwolizumumuzebelib.pdf
    • http://benhvienlaptop.biz/userfiles/file/fajukutoligifesigebovem.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fabfb5c468---wemev.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607353083f671---gabilajonuwopopejilakuba.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/12f9555891388f0f9e776704e566e95b/rilufokeja.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c30be0385a6---seledetaginivitebo.pdf
    • http://branpc.in/ckfinder/userfiles/files/90267106108.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9e21a1511---xiwizedujabutadegejal.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/8979b0bd94067473e77c7acfb060b826/37121703282.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=best+cheesecake+recipe+without+sour+cream
    • 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_off0000f17a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF17A 16792 bytes
font_01_sfnt_off0001098c.bin
3f1d56bb4f10b5efbbe8769d6817c901ba6431de24a3ee8c7c603ea2f2c099be
pdf-font-stream PDF embedded font (sfnt) at offset 0x1098C 16796 bytes
font_02_sfnt_off00013539.bin
d59a30b163786d088eb1157a3821a5adf3d46139a8065505c3b307afc5637fbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x13539 10820 bytes