Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafecc4920bc9bb5…

MALICIOUS

PDF

66.9 KB Created: 2020-12-15 05:59:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 670ef2ac27949c756b49f5ff17f100c5 SHA-1: 2da6f83f530855a231be9af97a63696d5d8117c8 SHA-256: bafecc4920bc9bb5564848669b91778d0b1894a56d98f6bcbe447288794283ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm designed to manipulate search engine results. The primary URL, 'https://trafffi.ru/123?utm_term=incarnations+of+immortality+book+4+pdf', is presented in a way that mimics a search result, likely to trick users into visiting malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/123?utm_term=incarnations+of+immortality+book+4+pdf PDF link annotation
    • https://rijivujebevobog.weebly.com/uploads/1/3/4/4/134488471/07ac0736e4159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_5f8974424e108.pdfIn PDF document text
    • https://bazapefonufoteb.weebly.com/uploads/1/3/4/6/134637130/d0f57e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468571/normal_5fa3633248eb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_5fd6f1f756fed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445343/normal_5fd7d0b3e8395.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc3c939bd14ff0dd2ae97c9/t/5fc464009b1ed0353869b644/1606706176997/99676672386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdada297-a245-43af-9399-8639af5e2a9c/mowukiwirobe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78ba439503a47f6fe0002/t/5fcbe75364036b61439b8650/1607198547934/87946640797.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28998403f5353fda0357a/t/5fc3e58708845d0924018b9c/1606673801281/epsxe_full_screen_button.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14b3cc89e1c4b8fc11549/t/5fc538f0f81c9a2a0c4cf640/1606760688900/the_stupid_test_ultimatum_unblocked.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC976 5632 bytes
SHA-256: be28054af599797c0588422260bb570ad570db0662ac8b23c0d430e20cbd0545
font_01_sfnt_off0000dc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC99 10020 bytes
SHA-256: ad41b7639df1a25db5320ed78f6a813835fb6e4e4fb3ef0f49e57783e470a536

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