Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d661b475f39da40…

MALICIOUS

PDF

84.5 KB Created: 2021-04-24 10:20:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b61a51370370c039d04204a8185a093c SHA-1: cd0120110ebf82d15c53fca781ccdd8086f3d5d0 SHA-256: 1d661b475f39da40546dddbe7237c588ec85143ab947441196b50f22a055a9d8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary URL, https://lozipotod.ru/strik, is likely used to redirect users to malicious content or phishing pages.

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://lozipotod.ru/strik?utm_term=what+does+the+penal+system PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370089/normal_602ef3583dee5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425921/normal_5fe03fae32842.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383802/normal_6006412423bed.pdfIn PDF document text
    • https://mefiwoteta.weebly.com/uploads/1/3/5/9/135956645/burirejafa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457590/normal_5ff58dd020e68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_6039cec831ac8.pdfIn PDF document text
    • https://befufagu.weebly.com/uploads/1/3/1/3/131384284/7656919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379960/normal_60545a1c65b0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410714/normal_6034306bec7f7.pdfIn PDF document text
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/2b07772.pdfIn PDF document text
    • https://xobagosuwetir.weebly.com/uploads/1/3/2/6/132680986/dc596d23946905.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/wunojipu/top_books_to_read_2020_non_fiction.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/satufisovaruguko.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/how_to_write_a.screenplay.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/zogezarujabu.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/nivafezopazevegulutijera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b5c9570-497d-4c4a-a1ba-006d4b892db1/mojiwigafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a675a2-26db-4b4e-977f-76270bde13a8/17062825425.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/how_many_wpm_should_a_second_grader_read.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d006bbe-ac84-4735-8f11-e3b4fbb9448e/company_of_heroes_movie_imdb.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

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_off00010f15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F15 5220 bytes
SHA-256: 7b92b80be3f3f269e2e197ba32c201a9c8ab3081316fb36184ebad9e7be22998
font_01_sfnt_off000120c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C6 10620 bytes
SHA-256: e417680b8bb70c1884120bfbbce4c927340baa0587d4a11fc8171aea103c7122

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