Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75bca37a193ea12…

MALICIOUS

PDF

74.3 KB Created: 2021-03-27 17:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c0f9f25b5c1263907782201c1a3b6c57 SHA-1: b6a00e2af62315a3731bc3efb65c9a00fca97475 SHA-256: f75bca37a193ea12ce203540c77f3bdb2d8a5028428c259f48e9cd2a9e2b5af1
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/123?utm_term=filmywap+2019+bollywood+movies++housefull+4 PDF link annotation
    • http://instapriz24.online/wyze_outdoor_camera_battery_replacement4vmv0.pdfIn PDF document text
    • http://igoscandinavia.com/how_many_times_can_you_take_the_arrt_examtaqi1.pdfIn PDF document text
    • http://grinallex.shop/ligawojlpr3p.pdfIn PDF document text
    • http://slimerecipe.org/448608855262rcx5.pdfIn PDF document text
    • http://reduslimitalia-official.site/action_plan_format_for_ngozd2r2.pdfIn PDF document text
    • http://euroshopme.site/82557187857fnllb.pdfIn PDF document text
    • http://tilinipusojod.22web.org/46039878629.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/zulunufaxifijikodoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_600fcd5dee7a8.pdfIn PDF document text
    • http://my-favshopg.online/uppababy_vista_vs_cruzv9adf.pdfIn PDF document text
    • http://dobofozepop.mygamesonline.org/33099981155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445881/normal_603ef8bce4492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450502/normal_604d157a737ce.pdfIn PDF document text
    • http://vuwobide.22web.org/lezawevo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388405/normal_6009a1d666ab1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_60297b4ba7bdb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_623f64477288409ea83d43bcc4ca742c.pdf?index=trueIn PDF document text
    • http://desakoda.rf.gd/telecharger_catalogue_oriflame_mars_2020.pdfIn PDF document text
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_00e9f5d1cd584dd78733c17a6d5ab4d3.pdf?index=trueIn PDF document text
    • http://zajoneforisomi.rf.gd/9292010976.pdfIn PDF document text
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_317bc8497cb242b98fef5bbdecd06404.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE324 6104 bytes
SHA-256: 59674eef36a3262c354e9eb6e5140f69dead2b5fc5b76ee302b225d375131833
font_01_sfnt_off0000f7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E8 10508 bytes
SHA-256: 196453c850595717a2492358ac6cabfbfdbe39687e796f7d10075d742d1bea5c

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