Malicious PDF — malware analysis report

Static analysis result for SHA-256 e730468ec019f531…

MALICIOUS

PDF

106.3 KB Created: 2021-02-18 18:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cce11a08fabf018ba7de7ace04ce1a69 SHA-1: 97a788d4541a19bf5348f55d8040b89803e57025 SHA-256: e730468ec019f5312afc43dd8f78c614b12789869e8d5794e7f37555474a29cd
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document functions as a link farm, presenting itself as a search result for a technical query to lure users into clicking on external links. The document contains numerous links to disposable hosting, many of which point to PDF files, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of vulnerabilities or the delivery of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://druttle.ru/123?utm_term=how+do+i+stop+my+frigidaire+microwave+from+beeping PDF link annotation
    • http://instasale.company/vowikixafxdil.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/9ff3bc51.pdfIn PDF document text
    • https://xujopikaxatanow.weebly.com/uploads/1/3/4/8/134850499/556253.pdfIn PDF document text
    • https://tusopapa.weebly.com/uploads/1/3/2/7/132712380/64a3f.pdfIn PDF document text
    • https://zalekekowijix.weebly.com/uploads/1/3/5/3/135346798/gojowepofemadufa.pdfIn PDF document text
    • https://vozuviwugil.weebly.com/uploads/1/3/2/6/132681927/8958940.pdfIn PDF document text
    • https://wewowalowumuv.weebly.com/uploads/1/3/4/0/134040384/4250106.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484806/normal_6009bdb1b4cd7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tapogexolewiji.epizy.com/japanese_denim_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/81251381763.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/printable_monthly_calendar_july_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/10638592627.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_off0001655e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1655E 5796 bytes
SHA-256: 895687ced6513c7efe2f6e4e839a7d8c262a5819a814dc43cfa6599d2776747e
font_01_sfnt_off00017920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17920 10348 bytes
SHA-256: 65e3db071b65f8ff4b135bbd69e572403f00160092e81d282e3cd6772a243907

Open this report in the interactive analyzer, or submit your own file for analysis.