Malicious PDF — malware analysis report

Static analysis result for SHA-256 9584c88599d616ce…

MALICIOUS

PDF

66.7 KB Created: 2020-12-11 18:12:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4177a3e9a99c09f0b142f4bad4d49e6d SHA-1: 965e1b3cc252ce7ddc1d84fa96e0b68855a47053 SHA-256: 9584c88599d616ce80914e13b706da8db0f4b8c157c3d169cb4fc5dead8d8e31
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://traffking.ru/strik?utm_term=greyhound+package+shipping+tracking PDF link annotation
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/netajexotikawita.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/vibezobakaponezijo.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/nidale-kokopafupoxa-veripinu-duvakipusomes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f874b7bd59aa.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/seponusebuw_fatexabogewugin.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/5fc0eca2be9b6939510ae43f/t/5fc6a0d361e25426e1211b11/1606852820681/87998286080.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79c6510d6a92a736d1026/t/5fce4b95fe657040d5c0feef/1607355285568/1671806256.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2aa47ab79f442f234e961/t/5fcf672c24ae147ef3dd3639/1607427885449/happy_wheels_playground.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c47bc39fde0238a550a2/t/5fcbdb23a51c5a1401b5b2c7/1607195430017/56861248377.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1162b68612547ed5f39f0/t/5fc44b1acb3e0f5771d888c2/1606699802757/57873726254.pdfIn PDF document text
    • https://s3.amazonaws.com/medadele/rcms_middle_school_cheer_dance_wolves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2570f28e-bb6f-4cdf-a010-68266c0ed725/tiramudutapofapus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b486ce5-c942-428a-8cd1-5965a8427e9b/kepukobir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6620c718-6833-4274-99d5-1fadaa49b0fa/xavep.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_off0000c708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC708 5500 bytes
SHA-256: c32f119361b6e430fcb24110393fa166ec5df99bedf19a21a67e1146523c32fc
font_01_sfnt_off0000d9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C4 10624 bytes
SHA-256: 0508bc6491e24277405b5c9bebf56b1683476e16352a453335124193464c039b

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