Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce2de268ae5dc54…

MALICIOUS

PDF

73.6 KB Created: 2021-03-20 07:18:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3b7d59cc9965fce60b34a833ba8c4d32 SHA-1: 117f5ab7434f46ac9b8be5bb40c32c6442d047be SHA-256: fce2de268ae5dc543fcea88be2f5546af013fe7b5813cf7dc1488b3bac5f4917
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://leonvi.ru/strik?utm_term=taylor+7517+digital+scale+battery PDF link annotation
    • http://subotufo.22web.org/fawuselufisubira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500189/normal_6052657538dca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465133/normal_603e832fd1f87.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443602/normal_5fe4012c20866.pdfIn PDF document text
    • https://lasapiboxemifol.weebly.com/uploads/1/3/4/8/134865682/3952139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488581/normal_60475932872fc.pdfIn PDF document text
    • https://gitumakiwu.weebly.com/uploads/1/3/1/4/131437138/6569601.pdfIn PDF document text
    • https://pafetujesotizi.weebly.com/uploads/1/3/5/3/135348857/0b220a3a7df.pdfIn PDF document text
    • https://doxugibako.weebly.com/uploads/1/3/0/7/130776338/didudivonawux_gasoravofopedin_fugazewitidumop_fabuvi.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/jolituzoji/chicken_invaders_5_full_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/vorunewuzorifapuje.pdfIn PDF document text
    • http://kusegipe.epizy.com/71628464936.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/47878557975.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/3388987385.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/avira_antivirus_free_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26aa15de-9036-4824-853b-efb99517fe1c/58755476349.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/30031823887.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/company_profile_template_slideshare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda7d9bb-1565-44bc-a51f-5de2bcb8a6f7/67506303265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07dea5d4-f65d-4397-ab57-5da2f9f50a42/global_history_regents_essay_topics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860ec25c-660d-4440-b3c6-48997d0cc771/51710410655.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_off0000e0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E3 5556 bytes
SHA-256: c57f83f68572ae7c90ea93b3dc7834b3b9216827ff48d1d0ba7aea4f3279f874
font_01_sfnt_off0000f3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EB 10916 bytes
SHA-256: 4e3e8562d0275252f801e3692bce0f44fdcb08b6a12b64b249f8829a46cb3521

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