Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3140d1d79a7f8d…

MALICIOUS

PDF

77.6 KB Created: 2021-02-17 05:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 01caf95275be5e447ea3a1216d8b80f1 SHA-1: 0995e8bb0cdebf4a18a9461f4f980c02adcb86b6 SHA-256: 5d3140d1d79a7f8d154cf2168cce3246f1e8c067400c8c3c52d6a9b7e3a7da5c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, appears to be related to recipes, likely a lure to disguise the malicious intent of directing users to external URLs.

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://jottigo.ru/123?utm_term=cuisinart+chef%2527s+convection+toaster+oven+recipes PDF link annotation
    • https://xupubiwe.weebly.com/uploads/1/3/4/3/134339906/2407859.pdfIn PDF document text
    • https://vojawafi.weebly.com/uploads/1/3/1/6/131636668/ad470f37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418197/normal_6001f878bd06f.pdfIn PDF document text
    • https://befadileniralan.weebly.com/uploads/1/3/6/0/136082268/769cd77cd9f7594.pdfIn PDF document text
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/jubule_safapaxoxoj_sinepoxawu_voxebogik.pdfIn PDF document text
    • http://unosital.space/mododumuviprqvk.pdfIn PDF document text
    • https://zeleloda.weebly.com/uploads/1/3/0/7/130776222/fazapotad.pdfIn PDF document text
    • http://itwow.info/13195056267ojrob.pdfIn PDF document text
    • https://wesulabiduzipu.weebly.com/uploads/1/3/4/2/134235649/7157083.pdfIn PDF document text
    • http://reform-st.ru/19162827092yifkc.pdfIn PDF document text
    • https://cdn.sqhk.co/manewujunug/aEYQXii/nhl_playoffs_standings_chart.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35E 5072 bytes
SHA-256: a0d712d84f81cbf7eaace80c05e7c4d58eef2a64d95899beeee83055a32ce1a1
font_01_sfnt_off000104a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A7 10808 bytes
SHA-256: c7d57d09eccb5f79fb476a8efc530d394b6224bcaae38b1cf9eef990d37c036e

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