Malicious PDF — malware analysis report

Static analysis result for SHA-256 1150f7148bdb738e…

MALICIOUS

PDF

89.2 KB Created: 2021-09-07 20:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d208b31135b19b73dea143a7498ccebe SHA-1: 45d3ad9d51dca720e5f6a541402c713c5f869120 SHA-256: 1150f7148bdb738e14b27e1a210cc509d3b1ed260baa919fd1fd7054cd9a5726
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://drafthe.ru/uplcv?utm_term=16+week+sprint+triathlon+training+plan+pdf PDF link annotation
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608d85dec7a7b---5469138062.pdfIn PDF document text
    • https://oferta.lt/i/File/xefolan.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/40640863046.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609914e2dc692---tulazobe.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be04f26bab---lekegefukutazod.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/2625a72d29ac9b0b1a9996e757119f27/56631775003.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/99869271310.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/dd8c09d40db89ef6c244ba995ce753f6/56249088118.pdfIn PDF document text
    • http://unityproductions.com/upload/files/vugelixawug.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/292701bce803101dd0d21371e601141f/vizoriwajijoxidopoge.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8fb8b5b2a00a6d70da70e8e719e42a5f/tuleruzuzosumefumiti.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/82510238293.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/69102590052.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/cfe708b6a2e6d6ddf3469dc523a37779/dikaloxasilik.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/a6274106607f1e4f54f794ef88f10bf1/buboperekajapixudon.pdfIn PDF document text
    • http://jacksonreunion.org/clients/71346/File/rabedivavagobel.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160885bbd2a1a0---junuxadevabenevun.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/930f9a86690d937702748a0948ef576b/terozapedavu.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/c8ec353982790f4749b524b6a9a01da7/duruwigubifubazesadetujo.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607937580e7d6---65937272058.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/76835893210.pdfIn PDF document text
    • http://jarosi.hu/files/file/bososupotal.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/54586908700.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF596 18196 bytes
SHA-256: 9f96d9f9446c40ee062cd8c31267d8e672dbd7ab446e53fb5ebd0d248adf1cf4
font_01_sfnt_off0001256a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256A 11080 bytes
SHA-256: 7b7e6f5aafeccd7f10b285aad1417bd77a69c5e9661443e6145939931e084c64
font_02_sfnt_off00013f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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