Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c6ca63d8c66c84…

MALICIOUS

PDF

74.4 KB Created: 2021-06-07 03:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e4a5d50bdb6fe661d25cea37a5898be0 SHA-1: 2966df67ef8942c5591c134ecb6ec0bf987a6d59 SHA-256: 45c6ca63d8c66c847deed6f140fcbd4b5588cc7f2e5538f3563b723e046194b9
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • 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://crewmak.ru/pbw?utm_term=que+haria+freud+pdf PDF link annotation
    • https://fivefijoxiwu.weebly.com/uploads/1/3/1/4/131453543/fupozazomoruwo.pdfIn PDF document text
    • https://lewibodozibepa.weebly.com/uploads/1/3/3/9/133997785/vurasuvaw.pdfIn PDF document text
    • https://mikedexe.weebly.com/uploads/1/3/1/4/131452733/7457663.pdfIn PDF document text
    • https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/1841809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484812/normal_600ca172cc4c0.pdfIn PDF document text
    • https://jikurufor.weebly.com/uploads/1/3/4/6/134613562/1092377.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465930/normal_5ff6c270a8c90.pdfIn PDF document text
    • https://tebelusagunesaz.weebly.com/uploads/1/3/4/3/134318259/407322.pdfIn PDF document text
    • https://kufudiketexolut.weebly.com/uploads/1/3/4/0/134096890/vijoridasemutakumez.pdfIn PDF document text
    • https://gawajofanobovap.weebly.com/uploads/1/3/5/2/135296378/d92f83c1491.pdfIn PDF document text
    • https://gojanevalu.weebly.com/uploads/1/3/4/3/134353606/sosolofikudonul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe1c239-5030-4280-a1ff-875d7f3a2142/sumom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce30c65b-48e6-4b7d-aa4f-f9703c6cd001/bertrand_russell_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a05b657e-08ee-47fb-ac1e-b74d4a04357b/subeloxozovatax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee3d5848-c4cc-493e-8bb0-a53d4aa11dc4/nec_dterm_80_time_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/681851be-6073-4e3a-8c43-93da3c73d995/dabixuvusezisenilepuwo.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_off0000e2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C7 4980 bytes
SHA-256: d9ff3e37c82be3276993a8cb79604df95c96a91ccf7123933c4742dc993ba599
font_01_sfnt_off0000f3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AF 12372 bytes
SHA-256: efa92c814bce0c7372899b2167247bcdc2dfe362a6713543d70c1d022272ef0c

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