Malicious PDF — malware analysis report

Static analysis result for SHA-256 927601a47e8b6005…

MALICIOUS

PDF

89.1 KB Created: 2021-07-25 15:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5a7c133295690c874905e4f3df8705d7 SHA-1: 183feadd3d3dd168e7b88065c970940ebeac4712 SHA-256: 927601a47e8b600593d30a8d5561ebd99062f546ed3bda3ae49ad088bec649c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS platforms. The document body is heavily obfuscated and unreadable, suggesting it is designed to conceal its malicious intent rather than convey information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/bb8b3c830fea3c15ef092be20ffa45a0/zupitowo.pdf
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/wonelewa.pdf
    • https://tekstilkentrehber.com/upload/ckfinder/files/sofojabetanixereluwabo.pdf
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/29072b52db9d34c843b5fa063a85aa60/84794631848.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096135ad9659---gobopa.pdf
    • https://maximatrimony.com/ckfinder/userfiles/files/texodokipek.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/pubekc61ji3k3g7uva8lmvfbt3/mafiviwujowa.pdf
    • https://hotel-la-licorne.fr/userfiles/file/23443577470.pdf
    • http://sva-jeanroze.com/xmedia/file/bewatitite.pdf
    • http://phatnang.com/media/ftp/file/40503730803.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/87f9480f2ec597e78d069bcf94c5a612/64947500495.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734c36b3a7e---gabosetoliruwa.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/fe1d83c3c0a65b055ec2d50f9ec47462/simaraxol.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d014137d70---wizotosaduruxu.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090b377d40f6---wosevegelag.pdf
    • https://gonguyenkhoi.vn/upload/files/13816223665.pdf
    • http://ray-king67reunion.com/clients/41562/File/20517188030.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/c05206e2ccd7916cdb8c307fc82448f7/55713731210.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3e4e7ff45---bezibegagotobesapopuboba.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/89a685e17673f300fb9bd42ec5ac5196/57101365565.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/dfhue86irop8l642mjrm4d40o5/50897387146.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+use+drip+line+irrigation
    • 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_off0000f9f2.bin
85d5b05d4ee8d0dde669146efeb77e9c552cb01d0b134f888926bf6694ba9378
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F2 16672 bytes
font_01_sfnt_off00012551.bin
7afba4d6b4a17e355f6d4573dade8336a69d7aa8906c7760d6840beee287269a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12551 10744 bytes
font_02_sfnt_off00013dee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DEE 16792 bytes