Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8711da635bd8e10…

MALICIOUS

PDF

82.6 KB Created: 2020-12-26 13:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3cacd8da81f996f45118b15892ce1918 SHA-1: e2f888c38082667d72b1ea5b38d876f4e683c6fc SHA-256: e8711da635bd8e10887f9f8e9d656da8938f2314c541db1e8cd5f7bae15471c1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

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://traffnew.ru/aws?utm_term=bounty+hunter+legend+guide+vermintide+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409102/normal_5f9d81c95df55.pdfIn PDF document text
    • https://fefajuvojamunuj.weebly.com/uploads/1/3/4/7/134750085/rorofokosu-kaxali-siwoluxopokaxik.pdfIn PDF document text
    • https://bofuzezuwava.weebly.com/uploads/1/3/1/6/131636972/a57859d3e71b39.pdfIn PDF document text
    • https://duzuvopewawufos.weebly.com/uploads/1/3/4/4/134491429/gokibo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5fd1f197ccaaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5fd279ea1e74f.pdfIn PDF document text
    • https://lobizuwoxigamog.weebly.com/uploads/1/3/4/5/134515373/8928645.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384155/normal_5f8e004a92c88.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/c63dc97f-5c35-4632-852f-8645b5677a3c/miwer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4ce3d97-d363-472b-8144-ba9748ae9e74/41713885028.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/52756322363.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/welatamol.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/katoxijipusib.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/zaximovikesik.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_off0001068b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068B 5192 bytes
SHA-256: a0832e5cbd1d66a7072b5749676530fe705669fb104362d312f938160200dbfd
font_01_sfnt_off0001181d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181D 10860 bytes
SHA-256: 60450bd5f16c78f12508356f7b3cf2bd4401e6a82dd12cbf5b887d16563311ea

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