Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb00f46ed75efb0e…

MALICIOUS

PDF

69.5 KB Created: 2020-11-22 00:36:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5a3421bbc1548b76b2f3f8d4b5f99f7a SHA-1: 1cdcb7df0a6e41c81a38fce5432330f2e402686f SHA-256: eb00f46ed75efb0e0f3853980c3611fe6d7c97f5774977c11dddb0a9a5813522
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=trees+have+standing PDF link annotation
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/4b78e02fcdea11.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/9682539.pdfIn PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/3115375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418987/normal_5f9ba92674d0b.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/zitatedusude.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/3955615.pdfIn PDF document text
    • https://fejegexe.weebly.com/uploads/1/3/4/6/134617501/4437170.pdfIn PDF document text
    • https://jomitapekox.weebly.com/uploads/1/3/4/3/134319499/gupuxilujemefuw-xuduvotuxenoriw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_5f920abbbc73f.pdfIn PDF document text
    • https://wijejotuxaketuv.weebly.com/uploads/1/3/4/3/134338978/fekedo_wabure_pukalit.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/8b7743b2-5a39-4393-aea0-f8e870d13538/82786877409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/879f062a-6f83-496f-9695-d51bdea5756e/18241874095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/377f2740-fc8d-4afa-92d2-e5e74b28d30e/56687371470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e474a0e-8405-4f6d-bb52-b30e52b3e1b8/koto_je_sagor_nodi_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/356896e2-e8e4-4103-b875-a970f8f4abbd/falunagalovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5d4990-d056-4435-ac89-e694d649483b/vifakepapol.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_off0000d479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD479 5064 bytes
SHA-256: fbbc71fdc8f0359fa9285773ec83fe9b5a402a576602696f4bfdaa3bb090877a
font_01_sfnt_off0000e5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B2 10496 bytes
SHA-256: 071649a84a1d6f1a89c4b1e7c636487f2821ec0bf061a5d897525af0b92cd651

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