Malicious PDF — malware analysis report

Static analysis result for SHA-256 d75de05b07e8fcb6…

MALICIOUS

PDF

88.3 KB Created: 2021-04-09 18:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b4d71005265f632b60d0440d4f150f1c SHA-1: 702a904e5de5fe55b53052ed46312131d595a3a8 SHA-256: d75de05b07e8fcb6061866fc8c420438748371e3e311f4111e7fbb0a07a64beb
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/strik?utm_term=la+divina+comedia+autor+y+genero PDF link annotation
    • https://kunagotuj.weebly.com/uploads/1/3/0/7/130739098/tojej.pdfIn PDF document text
    • http://klokisik.space/genejewanldado.pdfIn PDF document text
    • https://wikafifej.weebly.com/uploads/1/3/2/8/132815388/f45e39.pdfIn PDF document text
    • http://krepezh.guru/repojelorifimorrz2ef.pdfIn PDF document text
    • https://xasonametig.weebly.com/uploads/1/3/2/3/132303127/ce7687de2693.pdfIn PDF document text
    • http://cyberlife.store/redevali7c1k9.pdfIn PDF document text
    • http://fly-drive.online/zagubobamd6532.pdfIn PDF document text
    • http://sell-toclick.online/abbyy_lingvo_apk_cracked0yfe7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ef0d67-f7de-4a4a-a00b-7873aefa204a/what_does_an_it_systems_engineer_do.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/satuwutozawogowupelozov.pdfIn PDF document text
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_43b4a7df803d4921a79de83dddb4f14d.pdf?index=trueIn PDF document text
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_3c96b53f5eb445c69753c7f4a1877993.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/39735805054.pdfIn PDF document text
    • https://a581e706-3bf6-41fb-8978-ad4d4077590d.filesusr.com/ugd/afbe6b_25af8d403ff74d71b0e51690e94d5576.pdf?index=trueIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_d0f6c2c641d7470e9cd3f4dadf37bb1f.pdf?index=trueIn PDF document text
    • https://b3159766-6c8b-4733-a97d-e59ef6783693.filesusr.com/ugd/21851e_fec8629ec31d42fe91d25665113fa057.pdf?index=trueIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_0fccd9d492364374b8f49c2f22a345e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/84e06389-737c-4515-ae98-4566564de8b9/lg_top_load_washer_filter_location.pdfIn PDF document text
    • https://67acb2b6-3e42-4063-a073-371cb527a15d.filesusr.com/ugd/a81d48_81861bfea87e4d95ad9e5d3fc46a4cdf.pdf?index=trueIn 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_off00011bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFE 5152 bytes
SHA-256: 3c1021a3a24401272f89645010eceee4180391eaf2f6aefb83aac195c27411f6
font_01_sfnt_off00012d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D85 11756 bytes
SHA-256: e6bb08c23d68a538378e4c035b5608e59e3836801ce69b64c581ca66d97f8b8d

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