Malicious PDF — malware analysis report

Static analysis result for SHA-256 a630f27c701ff32d…

MALICIOUS

PDF

77.8 KB Created: 2021-04-03 16:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 53093abc3756effb6d175fd4b482fc1c SHA-1: 546d692a5d35901a33d18ecf05d22c9e7ad0a2e4 SHA-256: a630f27c701ff32d444f42640a7c16db7dea53dfabb90ac21a4aeecd56abc350
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The embedded URLs likely lead to malicious content or phishing sites, and the document's content is obfuscated, preventing a clear understanding of its specific payload but strongly suggesting a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/123?utm_term=adoption+forms+sample PDF link annotation
    • https://dikemogegopur.weebly.com/uploads/1/3/1/4/131406608/5599967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485165/normal_6063cc741b194.pdfIn PDF document text
    • https://fovozipi.weebly.com/uploads/1/3/0/7/130775458/tufazeku.pdfIn PDF document text
    • https://xadifopelizil.weebly.com/uploads/1/3/4/7/134771643/5435867.pdfIn PDF document text
    • https://sojizekupiguj.weebly.com/uploads/1/3/4/5/134586608/1418854636.pdfIn PDF document text
    • https://bekitatabegoze.weebly.com/uploads/1/3/0/7/130775701/tonufo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460247/normal_5ff2d5105f27e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446280/normal_605684e829648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_5fd7c3d09905a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383802/normal_6051219725e15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459645/normal_605021202d6a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383451/normal_600597f5471c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443576/normal_5fdec3f035102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403541/normal_5fd377b8dd8e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372383/normal_6008e8ba82ef0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374851/normal_5fd0808814c16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/biturijubiligewaloraj.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/46796872019.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/draw_me_close_sheet_music.pdfIn PDF document text
    • https://6998e30b-c911-4113-ab34-4c15204891c7.filesusr.com/ugd/429b25_5b19df218d1d40bb8892c2543ceadfa8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/is_30_mbps_fast_enough_for_roku.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/widigoruwaxux.pdfIn PDF document text
    • https://e1bd05e7-a2ed-43df-b5fc-9bc8ee0b1a84.filesusr.com/ugd/08acf3_871eb0970d6949e38604c97b2a7d2ad4.pdf?index=trueIn 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_off0000f33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33A 5176 bytes
SHA-256: 8be3a7e2103e27ef58a8d4820907e5e9d47727f14e0b35a082f88f977723089e
font_01_sfnt_off000104c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C1 10900 bytes
SHA-256: ab2ad8f9ee7d12e52880d357901eebc9cac125743f899e6c3b3cd93a3be42903