Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce91cf350f5ed713…

MALICIOUS

PDF

74.6 KB Created: 2021-03-25 05:15:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8d3641e6f3057126909cb80c88ea6354 SHA-1: 53c582e548301748e68c4485789d60dce5e8bb37 SHA-256: ce91cf350f5ed713a488aa6926f5911d5a822075e30d4c1d27515e5b97332112
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://xezojetit.ru/123?utm_term=android+linux+terminal+root PDF link annotation
    • https://cdn.sqhk.co/jaxaletadi/giYViih/nowoxororemalijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_5fe6a073db4f9.pdfIn PDF document text
    • http://zatizoxitosake.22web.org/ak_logo_png.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418987/normal_6035fba719266.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/jegg5KH/telemedicine_appointment_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/cboyd6B/kazerugezepubiloxonewir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462714/normal_605a4dda5f8cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_604e6baf018b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445555/normal_605bc2d0e17ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_604d827becef4.pdfIn PDF document text
    • http://funofuzifige.iblogger.org/sankara_mahadeva_chandrachooda_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413701/normal_60292ee559ce2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fezibebub.rf.gd/how_to_fix_water_hammer_in_irrigation_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea77bb1-0b81-4c0a-b81e-a6f75d8e0158/fefagikimabiwisisasiwonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4f5f5f6-8ca9-4844-860c-d0fbdd879763/karokaxi.pdfIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_7957c8dfcc12453a975cc88ec6833ddf.pdf?index=trueIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_68bde07b07dc47dcbdf67a29dd1c314a.pdf?index=trueIn PDF document text
    • http://vofexepevoja.epizy.com/81442780017.pdfIn PDF document text
    • http://vigopul.epizy.com/bncc_de_histria.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_off0000e6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D7 4852 bytes
SHA-256: d83fd2b4c921d6f1defd8965b2e7e4debbc9598bb6dbd6e03bf58bbfe8e0e8eb
font_01_sfnt_off0000f73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73D 10644 bytes
SHA-256: 8a8fc2ec0f8dd6032f364fa910fac99d6b8cbc6b3d80625e4526e2ae3da4c7ae

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