Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ff387bfe973b2e…

MALICIOUS

PDF

75.1 KB Created: 2021-05-21 05:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7c3ab64bb2edbe827185480fde6c1c06 SHA-1: 4297d7d38c81f1c420f4029a3c72a25a99ed75b6 SHA-256: a1ff387bfe973b2ee47ffde321669125ee94ac5f1462f089f2d2eef77c93e168
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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=arby%2527s+2+for+6+april+2021 PDF link annotation
    • https://ludefojixik.weebly.com/uploads/1/3/5/3/135347049/cb2f6e8.pdfIn PDF document text
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/95a946.pdfIn PDF document text
    • https://genezekanoz.weebly.com/uploads/1/3/1/4/131413678/tidiwukujegeporomi.pdfIn PDF document text
    • https://xikunozazoteta.weebly.com/uploads/1/3/1/4/131453294/e41c995.pdfIn PDF document text
    • https://tonawonigavima.weebly.com/uploads/1/3/5/3/135345065/74550f09ced1e.pdfIn PDF document text
    • https://tebiwexarug.weebly.com/uploads/1/3/1/3/131380746/5243005.pdfIn PDF document text
    • https://povarudoro.weebly.com/uploads/1/3/5/3/135324530/744d1497ac90.pdfIn PDF document text
    • https://kekufakaxuw.weebly.com/uploads/1/3/2/7/132740700/bifekaxejo.pdfIn PDF document text
    • https://namoxatiki.weebly.com/uploads/1/3/4/4/134477177/da96968.pdfIn PDF document text
    • https://laduvozonos.weebly.com/uploads/1/3/1/4/131408864/931a2b12.pdfIn PDF document text
    • https://nitowapesapu.weebly.com/uploads/1/3/4/4/134442046/zogoxonadupitevanafo.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/3425232.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/d3313af6-50ca-487b-8cb7-d5c16619150d/vepuwogofujuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d6a3f50-1dea-42b0-a52e-900cce8fe0b3/luzepirivonuvixusatumutow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03a929f2-071e-46cc-9847-25ebc630f37b/fishing_lures_for_sea_bass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b084765f-c5a4-4495-8524-bd091409a567/ejercicios_resueltos_de_graficas_de_funciones_trigonometricas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82943c25-6f00-4a3f-8893-08171b836b4e/which_sat_prep_book_is_best.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/208a3075-a4fd-4dba-acbf-b30b4925f9a6/cours_dadministration_des_affaires.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0090f961-a3b7-4d06-82db-a3c4e96eb4f2/oster_oven_cookbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77edb565-3de8-485f-8e89-2655a46b634a/45826331252.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_off0000e377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE377 5640 bytes
SHA-256: 18e92ea61ca3a84d6a1e3ee43dc52d479af15eec59fcf9f20bac04c9e381e572
font_01_sfnt_off0000f6ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CE 11404 bytes
SHA-256: 0b16bb39dff50ee412b31bddb081ac58866a7cbf9b467d204f58932af864a669

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