Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b63c65387678a18…

MALICIOUS

PDF

74.1 KB Created: 2021-05-29 21:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 060055adfaebdbc62271bd3c6177297d SHA-1: dd94d890b010a5267c1c96e3ce7cd12f85dd8097 SHA-256: 8b63c65387678a18fa9dd27c31151347c3762420d2555467f97c1593779ade60
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://nipisod.ru/strik?utm_term=networking+basics+questions+and+answers PDF link annotation
    • https://sasadopebob.weebly.com/uploads/1/3/5/3/135324308/8282889.pdfIn PDF document text
    • https://fezapatinegu.weebly.com/uploads/1/3/4/2/134266508/ravemudu_modokaxago.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451549/normal_600a82b0a2ac2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_60462451bf4ce.pdfIn PDF document text
    • https://foxakiletomuxo.weebly.com/uploads/1/3/4/0/134012751/7345326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421473/normal_60271f007c4b7.pdfIn PDF document text
    • https://jugafuxuxeg.weebly.com/uploads/1/3/2/7/132740719/ebba63df48.pdfIn PDF document text
    • https://sojenumodab.weebly.com/uploads/1/3/5/2/135296615/xelugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408348/normal_60192951db919.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408343/normal_5fc67cca3e9d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_605fdb9c2f469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458849/normal_606aeadc38b3a.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/7d0d629c-cc1a-46a6-95cf-f75270f4e16f/salems_lot_book_club_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4c7050a-99c0-4793-9e2a-a86b536b356d/wivibedoxosufofubomofenok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e64373-922d-43db-9661-207c07e9f964/84449478472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36fbfe05-dac5-47bc-932f-7b7914940a73/hp_elitebook_folio_9480m_drivers_windows_8.1_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb619c0-0f7b-441d-926d-5d4e1e406277/dream_interpretation_dead_mother_smiling.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_off0000e5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A0 5468 bytes
SHA-256: 685ec8954d5ead34ebf590fb1173a645f6f79390078eed1b61fa96c83d2d0a4f
font_01_sfnt_off0000f855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF855 10212 bytes
SHA-256: 3d2299a3fb669619880623324ad4bacd7333cd0b887d391fdc5f4ec4755819cf

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