Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd24ebe062bcd80…

MALICIOUS

PDF

79.2 KB Created: 2021-03-01 22:04:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cd7f0b218e801d428d261e13d8222183 SHA-1: caa5512b3717f500aa8f0bdb0ba59118637d1e94 SHA-256: dbd24ebe062bcd80dbe5a1ca3e74e04661bebb95626e73451482517af3a7e823
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://xajibur.ru/wix?keyword=best+pre-workout+supplements PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370055/normal_5ff0265205115.pdfIn PDF document text
    • https://tirevenisigagum.weebly.com/uploads/1/3/4/5/134500803/d63c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374535/normal_6003792895c73.pdfIn PDF document text
    • https://xoluvaxabezil.weebly.com/uploads/1/3/4/3/134338990/788555bc1ee.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/hjhiBXo/46213368479.pdfIn PDF document text
    • https://lugarulanug.weebly.com/uploads/1/3/5/3/135383187/3235134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426549/normal_6019c683ed1e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403130/normal_6004f738576df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376103/normal_601b6db32810c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448332/normal_5feb9424e3108.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/tazedarorud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_6039a70e2e076.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/hcJigjg/dibasic_sodium_phosphate_ts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488329/normal_60015be2c57c0.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/desekusoxi/chemical_kinetics_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/vigigitimes.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/calma_pedro_capo_song.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/foolproofme_answers_module_4.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/27217751803.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/kowotepomuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/double_cardan_joint.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/edscratch_teacher_s_guide.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_off0000fa5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5D 4992 bytes
SHA-256: 82e323e930f0d4b3574351b90d919285d0a19782b87a6b32a94e7a3ae6bc7a5d
font_01_sfnt_off00010b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B65 10592 bytes
SHA-256: 8263812816ab7bb317214f87b79996b89c397b4d67644e45bd071bb8635f3608

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