Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d63983aa03ec241…

MALICIOUS

PDF

81.3 KB Created: 2021-05-23 15:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ca61af8d1ec810e5975af0974e75f890 SHA-1: da5eb53fbb90a7209edd9af42ea0b1c20514757b SHA-256: 4d63983aa03ec241d5c91814e9232d7e7f2d3a662792367401b98a092e00c31a
156 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 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
  • 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.
  • 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://dafemum.ru/strik?utm_term=la+novia+de+estambul+capitulos+completos+en+espa%25C3%25B1ol+capitulo+144 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377924/normal_60560bb345d34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414680/normal_5feb8dfa864d5.pdfIn PDF document text
    • https://bilewemebit.weebly.com/uploads/1/3/5/9/135964156/b2166106064.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409093/normal_5fe52dccb7978.pdfIn PDF document text
    • https://zedodunojoponex.weebly.com/uploads/1/3/6/0/136083391/2571029699a1bd9.pdfIn PDF document text
    • https://seduzitatadobi.weebly.com/uploads/1/3/4/3/134371103/mokifuxexam_bekisale_jejezatemiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368982/normal_5ffd5399ad29d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5fd1e61a26d1e.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/bolovopizonuki/what_is_past_perfect_and_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79153495-0426-49c8-ad9a-2fcf68fbac23/dachshund_coat_types.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b42e7d97-15b0-4f23-bbc3-e2c05f6a3aee/bahubali_mp3_song_download_2018_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/4875912642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04249ccb-4972-4b10-8a9d-869f9057ba1e/the_book_of_nod_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/belesuvinexotafukarub.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/filemaker_pro_16_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/halo_reach_pc_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/gold_brick_guide_lego_marvel_superheroes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc20947-54b8-4836-badc-8d0bfe5e9094/zipatipojokuragufomoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1768bad-6aaa-42de-b184-7f1e6702d8c9/45733741479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02b704b2-d945-4e49-a865-5e9d8ad8ea7b/xutarofogaxipe.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_off0000f85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85F 5616 bytes
SHA-256: 88400f823b0970953f1a856504c80110534bd95c764a0c460438def992543923
font_01_sfnt_off00010b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B35 13732 bytes
SHA-256: 46bc0777a6b7570b955d8cf987b8d83660cdd0ea06057b09ea987b470db0e251

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