Malicious PDF — malware analysis report

Static analysis result for SHA-256 19398d137e0552f3…

MALICIOUS

PDF

76.3 KB Created: 2021-03-15 15:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ae07c20df63b6a33023ff04e6b0844eb SHA-1: 5b5f35fd5a7524072e28357a889384ea0374c9ec SHA-256: 19398d137e0552f35affb023a6ebbaa81899f6a4864d642afc6cdb535a7b07a0
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 0.9997

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://gimoguvi.ru/wix?keyword=terraria+android+apk+full+version+2019 PDF link annotation
    • https://zalevetupuxigex.weebly.com/uploads/1/3/0/7/130739655/gixafipiwawoliwaxi.pdfIn PDF document text
    • https://runewabelew.weebly.com/uploads/1/3/0/8/130813516/mebexor.pdfIn PDF document text
    • https://rajilogibakew.weebly.com/uploads/1/3/5/3/135326989/bd313e710a76001.pdfIn PDF document text
    • https://zutovabofilosu.weebly.com/uploads/1/3/4/3/134333865/suzuzegowozatojar.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/juliziwojatige/google_spreadsheets_l_g.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/brotherhood_song_dj_hans.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/endocrine_society_guidelines_diabetes_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6cefdfc-1ec7-4bf2-ae72-87a9f9bffa37/rajuzubobovoxinilo.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/87715086158.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/xetumewalawunuluf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a7730c8-6472-4bcf-b4fb-ce3cbf15e981/what_happens_to_people_who_dont_know_toothpaste_from_putty.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/339b4d22-5524-4d54-9076-da57564c6892/why_is_thermador_so_expensive.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/paporamumigopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6070ef01-9d0b-4ba1-9b3b-1c6ea6bf8f41/98623726843.pdfIn PDF document text
    • http://sejonigimanam.epizy.com/jebonoraxifavufaruwo.pdfIn PDF document text
    • http://xapimiwosusuv.epizy.com/43101598738.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/organizational_behavior_case_study_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/lagu_alvi_ananta_tiket_suargo.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/fakamesi.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/34311281094.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_off0000ea33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA33 5588 bytes
SHA-256: 740d0790a1c55983c02edaae1ef9eb2c50235af2efe46628690f68f63961004e
font_01_sfnt_off0000fd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4F 10944 bytes
SHA-256: 5e7759db85e65a629615ba8855936a055818269120241f5251f2009d4b86fc97

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