Malicious PDF — malware analysis report

Static analysis result for SHA-256 702398e1d9f64a5d…

MALICIOUS

PDF

65.7 KB Created: 2020-12-14 20:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 61903f78fcf243865c9cd97038b915d9 SHA-1: 42e5f2cf9c0a6326bc107cb5a58f2169b609beae SHA-256: 702398e1d9f64a5d7430efc9716d3e89a5ceabc7071b472880c0d3c6c3076f15
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 0.9998

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://trafftec.ru/123?utm_term=pr%25C3%25B3ximos+partidos+del+real+madrid+en+champions PDF link annotation
    • https://mavipevawifuduv.weebly.com/uploads/1/3/4/5/134598931/fa5c62.pdfIn PDF document text
    • https://jiparebifipi.weebly.com/uploads/1/3/4/6/134638028/5783393.pdfIn PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/fofuwumok.pdfIn PDF document text
    • https://mutimerujufidi.weebly.com/uploads/1/3/4/5/134526942/bbdc5f4f1befda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465270/normal_5fd13dac14d5f.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/d0325fd6-3574-40f4-89e1-a1b8be53d127/15462914786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b9837a3-687b-4a9c-8697-ae66a5ba2af8/historia_de_las_religiones_james.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/tour_guide_barbie_toy_story_2_costume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3a1b2c1-a3bc-4145-9465-c7e74f33b7cd/what_are_your_parents_cousins_to_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e103da30-664e-49b0-9713-25294e633584/paburomiwixifeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f60a52-85b1-4ac2-bd83-f2b87a422dd9/dubapatipovijawar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fb89043-6e5d-4a0f-93e4-70ce7c8b59f4/peruduki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3f3b2f-5fd4-4b66-897d-93bd5bc8ebc6/magob.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/jury_duty_summons_template.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_off0000c11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC11D 5516 bytes
SHA-256: 6f0d31f72eb88923d0d2fb2d6d6d4d3bfb12701ada1bed01c1deda4032d04389
font_01_sfnt_off0000d374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD374 11008 bytes
SHA-256: b5e406113cb5f48814ac28c295e220e349f39d39ee78b861e631878980342d5a

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