Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9644d06d44f08a3…

MALICIOUS

PDF

80.9 KB Created: 2020-11-09 23:03:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8b7408031446f1ad7371ecd999a627d1 SHA-1: d7da1c9084a230bd0b5f92c4529bb5c71286835c SHA-256: f9644d06d44f08a32252f4f76df660eba10442c301399043206032f851ecedd1
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://trafffe.ru/123?keyword=der+besuch+der+alten+dame PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420907/normal_5fa544d929b4e.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/8562426.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/xekena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486534/normal_5fa8bdea1b051.pdfIn PDF document text
    • https://gamorajemusuro.weebly.com/uploads/1/3/4/3/134316050/668992.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/c1030970-f47b-4570-b4a3-026d36d6f4a9/86597070356.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/dufupoxitepamevuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e2b83ec-4064-4d82-b445-e53e73caa8c8/xowikirolobeguname.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f36abff3-1b7a-4bb7-8993-9de537ef5ca6/rogue_squadron_wii.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/bubipikumirenakuxuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/077263d3-e260-46c6-934a-0ed87751e2c3/i_love_the_mountains_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4227b07c-3b37-40ab-a969-dcf66416be68/5145275769.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/how_to_summon_queen_bee_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c022cc2f-7e43-431e-87ef-f3da2858dd96/76313574209.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/lumber_tycoon_2_auto_buy_script_pastebin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c99791c0-d11d-4b67-898f-7ba0e0b7e8fb/kipofapizokubidegag.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD088 13760 bytes
SHA-256: 6b8f80ce2f7ba25e9076cad08fb3995c93c238925f8377ce3cd31c9e1e156994
font_01_sfnt_off0000fcbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBC 5316 bytes
SHA-256: 172ee1262eb15977413219d61ce7fc1b8f61c3781de352f4f0dca5fafe6526c6
font_02_sfnt_off00010ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA4 11248 bytes
SHA-256: 21d9bda0b71294761a19cd9a3603bfc785b5dc80d0282befedfed35219998367

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