Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1278a3d112e7e0…

MALICIOUS

PDF

80.4 KB Created: 2021-03-01 00:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0cb59a91fd2d6d58b5ec7eff2e720e4e SHA-1: e0a65bff071e456e9b08727aa0c04c645b091355 SHA-256: ee1278a3d112e7e0850db3a63715b038872d8c89db6a1d09940734c9a4c94aa3
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the sheer volume of outbound links points to a content-distribution or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/award?keyword=how+to+describe+the+moon+and+stars+came PDF link annotation
    • https://cdn.sqhk.co/vilonunufuk/nstzRhg/46708126321.pdfIn PDF document text
    • http://reduslim-officialsite.site/how_to_use_apple_cider_vinegar_with_honeyvgxr9.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/85404319009.pdfIn PDF document text
    • https://taxudomajifi.weebly.com/uploads/1/3/4/1/134108655/1189038.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/homgdgf/93354880350.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/bUjdar4/siwepusowixajonok.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/bhiziwG/vewezixotanenonewuroti.pdfIn PDF document text
    • https://sozezitevi.weebly.com/uploads/1/3/4/6/134639304/3662140.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/virgil_aeneid_book_1_latin_translation.pdfIn PDF document text
    • https://cdn.sqhk.co/gubisagebuto/jjgiwjc/draw._io_github_releases.pdfIn PDF document text
    • http://frut-tree.site/interesting_life_stories_podcastbpso8.pdfIn PDF document text
    • https://werobezukivipa.weebly.com/uploads/1/3/4/3/134337965/9669572.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/sulenidofotolikope.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/hgjijhj/word_search_free_app_ipad.pdfIn PDF document text
    • http://hookup154.space/8615102360hglx0.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/dGrqhiB/tugetug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/farefasejikap/ansys_aim_19.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/deluwoniso.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/jitolijowigokubola.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/11309916913.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9C 5128 bytes
SHA-256: fd77a373f9dfcf8b4da5981afe0d87a96386009a338cf7431046851c416a9cff
font_01_sfnt_off000100e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E7 10916 bytes
SHA-256: dcb61644d9c9fc48e5e112a8217d659019f6ab1f82823d5db2c2f9e018deb4a0
font_02_sfnt_off0001262e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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