Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba07789755febe4…

MALICIOUS

PDF

103.9 KB Created: 2021-03-13 18:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b3153b3e2d69a3ec6e3bc5dda6f54089 SHA-1: 17216e892f9e7945bfc70b089d967e75cda9b9a4 SHA-256: 5ba07789755febe4ecb349719fb769befcdb2ed22d5aca7bd8743973096a45d8
186 Risk Score

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 0.9996

Heuristics 6

  • 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.
  • 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://golowaki.ru/strik?utm_term=dante+alighieri+purgatorio+canto+6 PDF link annotation
    • https://zogoporev.weebly.com/uploads/1/3/1/3/131381602/5143125.pdfIn PDF document text
    • https://kibewuzogoluwiw.weebly.com/uploads/1/3/1/6/131636689/zezir-witowaxi.pdfIn PDF document text
    • http://begimewabifax.getenjoyment.net/almanca_eviri_teknikleri.pdfIn PDF document text
    • https://loxujonukirurob.weebly.com/uploads/1/3/0/7/130776454/392701.pdfIn PDF document text
    • https://fupopafesuz.weebly.com/uploads/1/3/4/4/134443157/9586739.pdfIn PDF document text
    • http://zufabud.22web.org/nekonakikavim.pdfIn PDF document text
    • https://fezuwarojeti.weebly.com/uploads/1/3/1/3/131383544/mexej_jemegisiwuwe_mowiribasuzi.pdfIn PDF document text
    • https://bubosetew.weebly.com/uploads/1/3/4/5/134515161/9304742.pdfIn PDF document text
    • https://xisudujerixaxir.weebly.com/uploads/1/3/4/5/134583325/286085.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_f99b20003f9a4c5f8deb847638970799.pdf?index=trueIn PDF document text
    • https://5dfb2dbd-6c80-4a99-afab-57dcddd938ef.filesusr.com/ugd/79d40d_209b2909f28c49dc90ee743bfea9e98e.pdf?index=trueIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_7a897d3af6e440b5925bfac48a449691.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/android_os_update_apk.pdfIn PDF document text
    • http://kenesowozowojaw.myartsonline.com/3281972045.pdfIn PDF document text
    • http://wugulinutefi.rf.gd/61916547202.pdfIn PDF document text
    • https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_88db0bb17cd74fe1a41e815d622ae070.pdf?index=trueIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_66c57645c6884679a7af4b4f50c7e5de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pazovugal/esl_worksheets_about_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/lexus_gx_460_dimensions_2018.pdfIn PDF document text
    • http://pokogasojogev.epizy.com/fabag.pdfIn PDF document text
    • http://puwagof.rf.gd/dynamic_vs_static_stretching.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/17948750276.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_off00015878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15878 5172 bytes
SHA-256: c8a1481f71a2be3e8c5c238d6355ab1ff0ee877f0fe75f8e651e59626c295bbf
font_01_sfnt_off00016a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A0B 12328 bytes
SHA-256: 56e0befb131d2bc4ada2939a70f23fcd1d77c859f2cd861b91b8f419793ad6ff

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