Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f653d27eae62f56…

MALICIOUS

PDF

79.7 KB Created: 2021-03-19 19:44:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f81c242ea1e48437cb16f2640de0f94b SHA-1: 20860b84bc888646de46539cae21f02e961f63d3 SHA-256: 6f653d27eae62f56ec0ee759bb1487058162922b1ab68b60bcfd97bbdfef3e0c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

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 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://leonvi.ru/wix?keyword=how+to+make+a+viewfinder+out+of+cardboard PDF link annotation
    • http://nebofimanigi.sportsontheweb.net/13237818979.pdfIn PDF document text
    • http://bahis-sikayet.com/tribal_wars_2_buildsk0yuu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408858/normal_5ffe640b6ec9e.pdfIn PDF document text
    • http://accface.in/15009192016poutj.pdfIn PDF document text
    • http://vquest.website/jejenofavedebexaroxakeqz0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410962/normal_5fee18262640e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424637/normal_5fd0e52354d5d.pdfIn PDF document text
    • http://vegifeda.mypressonline.com/kekewonenisosobosovis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nutajowaga.rf.gd/xofaruxomof.pdfIn PDF document text
    • http://bebovufuvuji.myartsonline.com/vefadu.pdfIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_8f1b65e0540947ccb85ca2d03d4cdccf.pdf?index=trueIn PDF document text
    • http://pazatirademe.rf.gd/plantronics_c052_specs.pdfIn PDF document text
    • http://pugipig.rf.gd/rukabezob.pdfIn PDF document text
    • http://zanerem.rf.gd/95473998339.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/swann_wireless_outdoor_security_camera_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea86d3f-8d5b-47e1-87ed-83c10a8eb736/zezodofitijapagim.pdfIn PDF document text
    • https://f3874c2d-c116-49c2-b7b6-9300dc8fc43e.filesusr.com/ugd/b11f6d_d884ca8c41a64897a51174ba85c61ef7.pdf?index=trueIn PDF document text
    • http://fenigubigona.epizy.com/how_to_get_diagnosed_with_bpd_online.pdfIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_7cc683ef9a054cee86f65dae778ab744.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db607f6c-4b66-4527-948e-1dc5ae51a540/17_indisputable_laws_of_teamwork_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a024be78-7b2d-4779-8cd9-76b72e3d71f6/rhyming_rap_words.pdfIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_1f468852e2ad410abcf3179d1608c783.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E1 5156 bytes
SHA-256: 18189ba10f5a5b64877c981e1ab0d0351691b5469379193ce8b59fbff6faf903
font_01_sfnt_off0000fb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB65 11340 bytes
SHA-256: 9df7929118fdde2cc0c175f65ba3b21c9f9c3bce8f4e262ad8289f8c120b6df3
font_02_sfnt_off00012177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12177 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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