Malicious PDF — malware analysis report

Static analysis result for SHA-256 72fac95c9f633d52…

MALICIOUS

PDF

70.4 KB Created: 2021-04-05 02:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c6a3047409e87ff57cc7f33390d0fbcd SHA-1: 573ed1852b4d78f682bd1135f0de9cbdd01375ba SHA-256: 72fac95c9f633d5265ec6c1a01f347c2dbc203fe931a555190ebb8e4877ee4b3
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 0.9997

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://xajibur.ru/strik?utm_term=motorcycle+repair+near+melrose+park PDF link annotation
    • https://falumegobe.weebly.com/uploads/1/3/4/7/134702986/5873033.pdfIn PDF document text
    • https://gojanaribebiw.weebly.com/uploads/1/3/1/4/131437307/8375707.pdfIn PDF document text
    • https://xulavuxedipi.weebly.com/uploads/1/3/4/0/134017657/392557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_600d9d6c6002b.pdfIn PDF document text
    • https://sigudadu.weebly.com/uploads/1/3/4/5/134513773/wagunesazo.pdfIn PDF document text
    • http://xojanefod.mygamesonline.org/wanujurenus.pdfIn PDF document text
    • http://cmbclientes.com/material_science_by_sp_seth_free_downloadb9znd.pdfIn PDF document text
    • https://kiloxuloje.weebly.com/uploads/1/3/5/3/135398856/3917972f88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494431/normal_60347bfcda149.pdfIn PDF document text
    • http://majikok.mygamesonline.org/77937470786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504791/normal_601a19bf0a6cc.pdfIn PDF document text
    • http://websporizlehd.com/niravejsymy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446147/normal_5fd7a8ddafd2d.pdfIn PDF document text
    • https://paxolobiwoke.weebly.com/uploads/1/3/1/1/131163878/e57804bb0b.pdfIn PDF document text
    • http://dibosezufo.getenjoyment.net/kebud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390684/normal_5ff34d676da24.pdfIn PDF document text
    • https://zojunakalej.weebly.com/uploads/1/3/2/6/132682915/koxazunoreb.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/karin_slaughter_blindsighted.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/in_cost-plus_pricing_approach_what_sets_the_floor_for_product_prices.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jigezilor/robirefe.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/kathi_songs_tamil.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_off0000d565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD565 5248 bytes
SHA-256: 397c3621612cfcfcc2a939fff3c11af3239b274ec4d2b326897414289a148fee
font_01_sfnt_off0000e740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE740 11252 bytes
SHA-256: 30afa11997f45149e7c1f5c8be4c51720a3e6c473cbb253121b9cbb758ba2801

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