Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd88713a0bc68fcc…

MALICIOUS

PDF

70.1 KB Created: 2020-11-18 17:04:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5e548c6c200f8c4b107ab5e9d3215a43 SHA-1: d2374d19206e003224d7495778355e1ff3a21d06 SHA-256: bd88713a0bc68fccc4f4d7b07575ef31ee01866ed60a9c71ed16915af111e84a
214 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=two+by+two+nicholas+sparks+free+pdf In PDF document text
    • https://gurapetiga.weebly.com/uploads/1/3/4/8/134852223/4470609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_5f98a35b4f656.pdfIn PDF document text
    • https://lupolaluxu.weebly.com/uploads/1/3/2/6/132681144/67fce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403410/normal_5fadbce1c9b62.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/zunewidimem/xedimiw.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/semuxexisirodukuromopugot.pdfIn PDF document text
    • https://s3.amazonaws.com/waxejajinigafu/nalitumanowuxofumokapit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d75464b2-65f1-4f3e-b8be-bdd9b17733d9/45619804912.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/hd_tamil_movies_free_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e7e34ff-9531-4ab5-9313-25e0672c45fc/kigojabexorapuwik.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/op_amp_circuit_examples.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_off0000d13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13D 5588 bytes
SHA-256: 6d9904161facbdb3c5f5227a0d7b66ea6064295475f83df6dff6686ffdb3c173
font_01_sfnt_off0000e44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44B 11428 bytes
SHA-256: de96ce8b0dd4eb454523dbff184b6944a4c555d0e993e71757a5ab0a948f2742

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