Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75510c619b9f4de…

MALICIOUS

PDF

95.2 KB Created: 2021-07-25 05:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e215a16e946a6a44c66810bc8b1e6187 SHA-1: 6f129b1b67e1cf5878bfde06ec78e9cff811d562 SHA-256: e75510c619b9f4dec76b382202a6968cde8c091b389794d0f96df9a0c4faa3b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a link farm with numerous URLs pointing to compromised WordPress sites and other domains, likely intended to redirect users to phishing pages or download further malware. The presence of multiple external URIs and the ML classification strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://equantumconsulting.com/files/files/remagisik.pdf In PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2ce160248---53991669750.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/55c4ee37ee51a045cd8b314d42263729/bedojejoputitajedon.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/22647140729.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b50674f81---55596117108.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d24b108cd---37856996757.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/ridoxepesaxolaribasodik.pdfIn PDF document text
    • http://recviem.ru/img/upload/25937032884.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/ladogaguzonuduwo.pdfIn PDF document text
    • https://duvarkagidierzincan.com/userfiles/file/25939789049.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/nja3k036a2tpok5n9qj6dttl76/lulabumufelutajo.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/6e987f4cce94584223da290ef6d6cdcc/22853876563.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a18c8d3294b---1685437619.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/tufeno.pdfIn PDF document text
    • https://jaiminsales.com/ckfinder/userfiles/files/bazumegunonigiridakow.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/gemosiwuseji.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/a3661d0d663d3b988ddff4d21d50e9b8/9895755846.pdfIn PDF document text
    • https://hpsoft.shop/upload/files/zomugezu.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/87838878525.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/46403839775.pdfIn PDF document text
    • http://eva.am/files/011ff15c3f14593d.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/zedagojafuminogaki.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f0a5b999e---35315595236.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=placa+m%C3%A3e+ipm31+drivers+win+7PDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7B 17420 bytes
SHA-256: f147485c6940705dc52385d13b0228985c3f0f60b358bacd2c5f0f5d1a7b811a
font_01_sfnt_off0000f5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CC 11152 bytes
SHA-256: 944ad8cf35d4f18acfb4d0eb2c4ad40a3b5305603b91be03c4eb86230db1b485
font_02_sfnt_off00010f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F81 2768 bytes
SHA-256: 5c950f9285612f4d64e9a9e9b64a0e0671528bafdde432fd44c937233db55778
font_03_sfnt_off00011b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001334e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334E 22980 bytes
SHA-256: 30d695206d0bb6f33962b36582eb7572bd35a1b373fd27c0f7d30b70b3e6abf1