Malicious PDF — malware analysis report

Static analysis result for SHA-256 96589094988d9eb6…

MALICIOUS

PDF

80.0 KB Created: 2020-12-30 05:19:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 700597722be4360c7d48dbba100610cd SHA-1: 12dba81aeb96621b92e062dfb79151482fb04de0 SHA-256: 96589094988d9eb6095942698510946b2a3164d9a836a692226ec996c058a6b4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or spam. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=oracion+del+dia+jueves PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5fa5f7a9baa9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450158/normal_5fc2165c147f3.pdfIn PDF document text
    • https://simisidexibasu.weebly.com/uploads/1/3/4/5/134502995/waxelogapabiz-jawunuzutula-xegubufibijasi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5f908fc50d53a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380379/normal_5f920bcba100d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380695/normal_5fe5fa520bc1d.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/webipejonavuv/femurevisid.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/changing_fractions_into_decimals_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb07317-9c01-4064-8143-235b79d55624/47988850393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48764caf-83db-4435-aa39-f3736f5d5342/65636606354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b19d445-e8ef-4e91-8f2e-1be3ec5f00be/m_words_to_describe_someone_positively.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab4168a3-f0c7-4591-a42e-a6eb7112dabf/senior_class_speech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc2b1fe-856f-49f8-86d0-561d5a8e055b/me3_rannoch_mission_order.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE309 6924 bytes
SHA-256: 5a31501951d8d517b8862c0a1c86e536c1d868df3895d741f75c0356794bcdb3
font_01_sfnt_off0000fa47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA47 5096 bytes
SHA-256: 9c75b17466fc62252f8365c5eed5968a117eb8dc0db7da57615664fe40ae7e42
font_02_sfnt_off00010bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB0 11564 bytes
SHA-256: 60627d020db37bb0203bae7b869195f4a4e50ea1e6466369aaa770c4a781804d

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