Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb42d02293a0143…

MALICIOUS

PDF

88.1 KB Created: 2021-07-17 12:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4dc4e219d76e47a4459270dd6d63d12e SHA-1: fa7eb002f32fac0b1c5d5f2761e153617b758328 SHA-256: 6eb42d02293a01433619f188ce1fbc8b23b04356cb2db4e894d1bbc590cd7742
96 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially compromised websites. The ML classifier strongly indicated maliciousness, and the heuristic firings suggest the document is designed to direct users to external, untrusted resources. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609727250ac25---93809603230.pdf
    • https://dadesigning.com/daduserfiles/files/68069255314.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b40d8a9dca---84148827618.pdf
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bupilosapiburafizofeme.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/a0861a714e5646bedf7411c3f0fa22f4/mapofelejerefaxasejom.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/335721fc649a5ecaa61ef3039f7fa14e/84673716463.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072195416ff3---pudinokupipinujuvekam.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160ccd17204b86---43922757255.pdf
    • https://b2cexpressdemo.com/userfiles/file/45477762957.pdf
    • http://vieclamquantri.net/upload/files/38569870934.pdf
    • https://palcev.ru/userfiles/file/79302961140.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/dm76g0nb8d0lma25hv02io6ip4/xowudokapuzufop.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/06d9d26f0f9072c07f0eb70407e016d3/20167918047.pdf
    • http://tantusmarina.com/UserFiles/file/nipexafe.pdf
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/mga34lkj153vic4eh70lo8t875/79538191136.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b65f21183a5---26370521199.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/ed446954ef2a7a3572c2dbf18811dc3b/niviwozajoduporofoxezi.pdf
    • http://ac-kenigsberg.ru/files/file/99236130101.pdf
    • http://hyderabadibiryanicorner.com/admin/images/file/36559578173.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160820d2aad788---mawukewaxunujepigujiba.pdf
    • https://nbtele.com/en/cache/fck_files/file/11552986983.pdf
    • http://rghsalumni.com/clients/82979/File/widizemotupakegotot.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/dccf7178f9a19d44d393cc1facf2024d/34219554860.pdf
    • http://ahxxzx.com/userfiles/202105/file/tikuwimexipawilulale.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=new+hotel+collection+harbourside+indian+rocks+beach
    • 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_off0000f328.bin
9b38b4ebb11e901762c2242652141bbfa2a8c234c4d5d4cc517817c326ec6117
pdf-font-stream PDF embedded font (sfnt) at offset 0xF328 10860 bytes
font_01_sfnt_off00010c44.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C44 16792 bytes
font_02_sfnt_off00012456.bin
2fc6b795818e99423a31d6536b299f71c2124575e08c8b978441c9b54ca52de2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12456 17704 bytes