Malicious PDF — malware analysis report

Static analysis result for SHA-256 50edb062b8d2440d…

MALICIOUS

PDF

66.9 KB Created: 2021-03-23 08:00:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4dbefc570ffdb14b0c7cd9c7c1ed1f6e SHA-1: 535639b508df1e6f1de3fa0193bdebdf8b08086c SHA-256: 50edb062b8d2440d172deeb5649c226257be1fdc49b6e07a038b93220bf48920
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-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.
  • 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/award?keyword=the+colonization+of+africa+by+alien+races+pdf PDF link annotation
    • https://gataforebulor.weebly.com/uploads/1/3/4/3/134337884/5134337.pdfIn PDF document text
    • http://pet-guru.shop/binozolifenosiroseluzi1ypnw.pdfIn PDF document text
    • http://artrosil.xyz/gewabeq0m9n.pdfIn PDF document text
    • https://dopovebo.weebly.com/uploads/1/3/4/4/134431975/e43c5809.pdfIn PDF document text
    • http://reduslim-official.website/memigegadojawadinswb98.pdfIn PDF document text
    • http://avtoshkola-region26.ru/husqvarna_sewing_machines_partstwflm.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/nowokil/geometry_word_problems_worksheets_grade_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8892ac09-1864-462f-b401-15ad9a80026c/xefuruna.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/autocad_underlay_hide_frame.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/47732628508.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/auto_tune_8_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/medieval_2_total_war_kingdoms.pdfIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_6be7aab4806a4904a5ea09bd5a35c014.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dukajevo/60544137369.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/lotaromijiritavugebolawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6076586-7746-4ea7-978d-05f37ddab409/wejamerumimagoxitasewalon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3160b07-5390-42ac-a040-372f03af93e9/24455574076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38beeee3-1ede-492e-b7b3-78cf5e724429/wijinimametitumigax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b58e3ab1-cc8d-43fc-a52c-47d7c43cc236/pusoxodax.pdfIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_61c27fd68f9f473a8c9a7f5e2047aa50.pdf?index=trueIn 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_off0000c70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC70C 5484 bytes
SHA-256: b943ac9f9ad7748b374baf805352a30e92492c100c36a4085d51bc3557952803
font_01_sfnt_off0000d9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B7 10660 bytes
SHA-256: 891d0694c74b90ee10b97715254046c560fc9826bf3c1c63c5ed8eb49efe6ffc

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