Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b624e6dbc39a35…

MALICIOUS

PDF

72.2 KB Created: 2021-05-17 04:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ae232a7a20e57959a8db3fba3861f3a9 SHA-1: 689e18988e0bcf03edd1a422b744ea3db483bd65 SHA-256: c2b624e6dbc39a3587e55f275340b53c1738ee095810e84e0177c6836d04c973
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=ps+form+2976-a+fillable PDF link annotation
    • https://nezejigon.weebly.com/uploads/1/3/4/6/134611081/a05891b85822e.pdfIn PDF document text
    • https://severuzilun.weebly.com/uploads/1/3/4/7/134710190/lunojobawilutumofibu.pdfIn PDF document text
    • https://katabeguravaka.weebly.com/uploads/1/3/1/4/131407194/2812461.pdfIn PDF document text
    • http://vsedlyatebya.xyz/rogewun1h0n.pdfIn PDF document text
    • https://rewodudifizaba.weebly.com/uploads/1/3/4/4/134475466/9676266.pdfIn PDF document text
    • https://rovividupezudu.weebly.com/uploads/1/3/4/3/134373795/gezagepatopenud.pdfIn PDF document text
    • https://kigolakelo.weebly.com/uploads/1/3/1/3/131380934/afeb1d135100.pdfIn PDF document text
    • https://bafejaligaxe.weebly.com/uploads/1/3/4/0/134018432/5753253.pdfIn PDF document text
    • https://fotavimapuwe.weebly.com/uploads/1/3/2/8/132816041/8145584.pdfIn PDF document text
    • http://sellamorem.com/los_atributos_de_dios_para_niost4cjf.pdfIn PDF document text
    • https://tudodamoziw.weebly.com/uploads/1/3/1/8/131872054/f3618e51a7bba4.pdfIn PDF document text
    • https://jevikefogonilij.weebly.com/uploads/1/3/4/7/134747067/2588398.pdfIn PDF document text
    • https://nabofirolem.weebly.com/uploads/1/3/4/6/134632364/337724.pdfIn PDF document text
    • https://pozemake.weebly.com/uploads/1/3/0/7/130776760/4093443.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5090cb7a-f7dd-45b7-a4a3-960150b62b23.filesusr.com/ugd/dfd4af_4d9d3a632c1f43b0bc3db661cbfa304d.pdf?index=trueIn PDF document text
    • https://5c54d0bb-9de8-469b-abb1-33232a952ba9.filesusr.com/ugd/370e3f_b9ea874a1d0a479a9c4f4707ccc636a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce0e65e-21ab-4e83-921f-5154ec266fec/bank_5_rivet_st_new_bedford.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/210268b7-07be-4454-89b4-6f0bd41f3941/24672205644.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC60 5608 bytes
SHA-256: 1e8493ad86a3b92a6d08c7fb47ee21bf720b3c401ba8f3f6a179c30f892e4e34
font_01_sfnt_off0000ef56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF56 10328 bytes
SHA-256: 8232df581e989a124cdb7fefd904ebcacd3577289ad83d6607f3b9dba406aa80

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