Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c0f6611bc4a374…

MALICIOUS

PDF

90.1 KB Created: 2021-07-18 21:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e7892a9ef345458bd7776bbe25befb2c SHA-1: 08f29b5fcf4eaed60d9a7c7185f275b0f352bdde SHA-256: 02c0f6611bc4a3742e15af000f78ea078f19addf8e2a3be839fbcbdf43304d9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised CMS upload directories. This suggests the document is designed to lure users to external sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63eba1cd7f---99495742708.pdf In PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeb1957172---potavogigezosev.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/vanafetokemanuwukulajoru.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/bozudagofopadajuj.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/93302112082.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/9510499125.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2f8845dd5---59240349153.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/zuvafolagoxafozemutu.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/79e3fcde76d70b113a823fd34add820e/3822123310.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/56723455612.pdfIn PDF document text
    • http://dothi.info/images/files/jasuragep.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/21787595029.pdfIn PDF document text
    • http://salinahighschool1967.com/clients/c/c9/c9c88be04994199279bceb128c91314f/File/xijijexizasokakejipiwo.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/84655912671.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b17542d46f3---65962903456.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/58e92104b0633a5d027d6369d537bce5/61644202134.pdfIn PDF document text
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/mojavi.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16085f7a0debda---witozazulebabiwuzep.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/b41cb01c06244474b5c5d495f6da1634/melagepotelazobeluj.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/wufiwedax.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2944294f0---babelipaxaj.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160961990233dc---52028688900.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0b52c4a67ec61b4b9fafcf92cc630bf/37323014485.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/ur8gg684hfd45nu6tv74t0pve2/97756559668.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/87356478219.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=unchained+melody+trumpetPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFD 17420 bytes
SHA-256: adf1dd1a1345174ee4385855006a54a5c30877273bbba2482c904115eaf22b7e
font_01_sfnt_off0001198a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13197 4224 bytes
SHA-256: b93ecdbee958ca01122364998dba6ca41ace5f25b62aa994dcd8f2aace5e6dbd
font_03_sfnt_off000141af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141AF 10832 bytes
SHA-256: aaefb4c039a87874e338860be4aacfe4ded5ffe40b4b584e3e1626eae88daa78

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