Malicious PDF — malware analysis report

Static analysis result for SHA-256 249362a03bcbfc52…

MALICIOUS

PDF

87.0 KB Created: 2021-03-28 23:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d54847e15a462856e35144ece898132f SHA-1: 9e6bde42c5a20f1bced6ae9f5792ab2b7c0f56b2 SHA-256: 249362a03bcbfc524d50e743121d6ac4e3a8822d21149f2d83edfdac66921a47
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://crophysi.ru/wix?keyword=sldr+hybrid+adjustment+guide PDF link annotation
    • https://sexaxekeka.weebly.com/uploads/1/3/5/3/135313825/82fbb86d3b7d70a.pdfIn PDF document text
    • https://wivoximuvekobug.weebly.com/uploads/1/3/4/4/134473281/rikux.pdfIn PDF document text
    • https://gikejujeg.weebly.com/uploads/1/3/5/9/135966421/zateniv-bewolixalevugaj-naxulebelus.pdfIn PDF document text
    • http://thesalle.xyz/8373628172noenk.pdfIn PDF document text
    • http://nuwiratuzitezep.22web.org/bulksms_for_android_apk.pdfIn PDF document text
    • https://vugosolisaxude.weebly.com/uploads/1/3/2/8/132814967/nemovegugulesiwu.pdfIn PDF document text
    • http://fubokukolop.22web.org/cambridge_advanced_learner_dictionary_free_download.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/gezidemex_kemedag.pdfIn PDF document text
    • https://kowedeta.weebly.com/uploads/1/3/0/7/130775164/xowabududuxiwiz_xonadurevovi_pajitukikewa_nigotigobarox.pdfIn PDF document text
    • http://motivawka.online/11590696723q7dwl.pdfIn PDF document text
    • https://gapibuxox.weebly.com/uploads/1/3/2/6/132695643/gizenor.pdfIn PDF document text
    • https://jugivukovetid.weebly.com/uploads/1/3/0/7/130739525/20f9e946ef735.pdfIn PDF document text
    • https://pogiwaxo.weebly.com/uploads/1/3/5/3/135312355/7820909.pdfIn PDF document text
    • http://espaceclient-cmb.com/sogefunudopufole4m619.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://piter.store/dimedobisabubedovudm2lzr.pdfIn PDF document text
    • https://vipapesad.weebly.com/uploads/1/3/4/3/134369303/5254409.pdfIn PDF document text
    • http://pokemonrivals.online/773800937096ilg1.pdfIn PDF document text
    • https://jenodaxadow.weebly.com/uploads/1/3/4/0/134012655/c0ef8bc5.pdfIn PDF document text
    • https://sunejojixin.weebly.com/uploads/1/3/1/0/131071277/goxiba.pdfIn PDF document text
    • https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/2189121.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jowuwivipi.rf.gd/37477336977.pdfIn PDF document text
    • http://wuvoxebegef.rf.gd/38464491749.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11306 5660 bytes
SHA-256: c86e53dabf7cbaf6de149040ebb84f0a8f341670b5b36dc24907d5fcddd0776f
font_01_sfnt_off0001261c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261C 11396 bytes
SHA-256: 35e446dc5a594bb562e2a83cf274c3562df74aa90b2aa97d814c85d0fa0b3a8f

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