Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ec3799e6cf884b…

MALICIOUS

PDF

81.5 KB Created: 2020-11-10 08:25:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a1257af1c9e00e67a363eaa720d2dbca SHA-1: 9d8a3b606568b9f8b8ce8af9d80fb8094a273c06 SHA-256: 99ec3799e6cf884b62f9d45aa173204f87c4bc133644166c5228d831273c12f2
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 0.9996

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://trafftec.ru/123?keyword=apadana+of+darius+and+xerxes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381748/normal_5f91b4f6a7b80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369308/normal_5f9fa9fc8386a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5f92e180f32f4.pdfIn PDF document text
    • https://xomevore.weebly.com/uploads/1/3/4/3/134346529/a7fe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417813/normal_5fa8e9c7e4e00.pdfIn PDF document text
    • https://gupoxebexu.weebly.com/uploads/1/3/4/3/134337811/2372769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389820/normal_5f9f90d0a39bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f90e079c2edd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_5f9890ce6d2fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420776/normal_5f9faa802baad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422367/normal_5fa276fb2b87a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f998db64cf7e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/sims_freeplay_hack_download_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/drive_me_insane.com.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/red_ball_2_free_game.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/fedezadi.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EA 3016 bytes
SHA-256: fd2e3381eae67f4c7fcebf164a8171a45157d0954041d1d900f2e75b0f5e8087
font_01_sfnt_off0000e3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B2 5060 bytes
SHA-256: 3af2dcc67edd2eae55b2f83c270dd63859e089163d938bc564f51c327498ce17
font_02_sfnt_off0000f4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FD 11424 bytes
SHA-256: 912be3a3ad9378f07107d3c9da0b2dd1a5fec106398eb7a03023ebc79257a244
font_03_sfnt_off00011b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B41 3288 bytes
SHA-256: d5ca24d361496cdd9acc28d716d8f0fccf491b716a78fa95dd1b20a67073c40b
font_04_sfnt_off000127cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CD 6500 bytes
SHA-256: 03cbf44059ea1faec8043a82d4df503cbf9de0ce49937202a4f50d5147a6a369

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