Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc76dcfb5f54162…

MALICIOUS

PDF

77.7 KB Created: 2021-01-14 19:26:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7b1e392dee6ab32937918f3e613e601e SHA-1: 7741a0e8af09ef23c13dbeaad2656b7e88ba6972 SHA-256: 5cc76dcfb5f541625c8c4224bb5396cbb8f12ebedb32aea43fa0f7635bcc5a5a
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded links suggests an attempt to lure the user to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/123?utm_term=owls+in+alabama In PDF document text
    • https://nejavedejelije.weebly.com/uploads/1/3/4/3/134336697/kimitumoga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491671/normal_5fbbc34511600.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/BuiclPI/tower_crush_hack_yeuapk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389601/normal_5fe086dbc7475.pdfIn PDF document text
    • https://barezixajeg.weebly.com/uploads/1/3/4/3/134318527/zivevax-todamovuduwudo-pobuziniwowixeb.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/salosibejodod/fidisidobavomovilene.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/21071443285.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/pokemon_official_guide_book.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/barsaat_ki_raat_1998_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/dafisokog.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/miseburinekuvavitosib.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/acpi_atk0110_windows_7_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/29385093496.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_off0000f425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF425 4996 bytes
SHA-256: c35ae8fd91e14865b52ee7bc0f46a0f4403c25634ac0f2051731b9fa6c7e40d5
font_01_sfnt_off00010520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10520 10872 bytes
SHA-256: 3f6aecc2bfee5b4b392856f887db23c80a01834757f157ea37af2f83dde9d847

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