Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7f0b6e61313a07…

MALICIOUS

PDF

79.3 KB Created: 2021-03-14 04:06:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cefa2f6784d33f7d14e13693cc6d5096 SHA-1: ae5718ebcaccdf7ad786dff15e180bc11d1fb6ae SHA-256: ac7f0b6e61313a071381c3bea6df28d81d218f3098629ad424b3a44627c7c462
156 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 0.9994

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 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.
  • 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://baarspo.ru/123?utm_term=eos+70d+user+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381344/normal_5fdd92e924f45.pdfIn PDF document text
    • https://cdn.sqhk.co/zativojor/igAgh1p/sandwich_king_chicago_restaurants.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423699/normal_602640d8c2379.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/LjhYjfz/mikecrack_yo_quiero_dormir_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/lepagesali/XAhchhY/celebrity_voice_changer_app_cancel_subscription.pdfIn PDF document text
    • https://pulapiselipatux.weebly.com/uploads/1/3/1/3/131378970/2236358.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485296/normal_5fcef5e4c9137.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453142/normal_5ff64a22d5456.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/gjioidW/lyrical_photo_status_app_which_country.pdfIn PDF document text
    • https://cdn.sqhk.co/koletexun/heXspja/volopagedezonugetigaje.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/bjcegje/dizakolufisis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_5ff53a2730f6e.pdfIn PDF document text
    • https://dunevija.weebly.com/uploads/1/3/4/3/134306837/petigupujela-nidijuzudinefob-torukowaredo-beximek.pdfIn PDF document text
    • https://gukenefekofuga.weebly.com/uploads/1/3/4/5/134588358/zumus-fisedane-zutomibirix-buzetatewuxo.pdfIn PDF document text
    • https://cdn.sqhk.co/lusimalifa/gfibShj/68854172392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_6049c3eef1e11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489429/normal_5fc7336e8e28a.pdfIn PDF document text
    • https://cdn.sqhk.co/rufazodaxu/hfK90gd/interim_report_card_rh_king.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwesedujila/sgehdjf/13285702000.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446646/normal_5fe151d9de0ee.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/752e66df-0bcf-4ac7-8e18-104654cbc9eb/gabriel_garcia_marquez_el_amor_en_los_tiempos_de_colera_frases.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9507de31-c55f-4c78-897c-d925bdc6d743/vuxoguru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0cf8b03-f321-4ba6-8a33-59cb0ce2e238/nazim_hikmet_almanca_iirler.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF918 5152 bytes
SHA-256: a5be4c7baa7a332333620ff809e62d6011241be8223003fc1932ddb573c2dbdf
font_01_sfnt_off00010a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A89 11236 bytes
SHA-256: f7a27df1cb0d2b1639db7142bab2b6d707e7e6e9b35b60e0ed56dc140fd74249

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