Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c3dfaa77cef3f51…

MALICIOUS

PDF

76.7 KB Created: 2021-01-20 00:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 642f78bfb1088a895ce8722cbf36ff0e SHA-1: 6b3e55719651318d29a825b0360b8f9794a3608c SHA-256: 9c3dfaa77cef3f51c3e0b11303e1c02e1922929090d812c79224fa6cd4b0bfee
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://traffking.ru/123?utm_term=a+course+in+miracles+made+easy+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411245/normal_5f969adc2fffa.pdfIn PDF document text
    • https://site-1207164.mozfiles.com/files/1207164/86902366389.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411481/normal_5fe4da7b89fb2.pdfIn PDF document text
    • https://cdn.sqhk.co/gidufulelav/fnlieie/top_100_djs_vote_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/jijasitov/gQ0g0ge/century_siege_td_battles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373281/normal_5fa52c591c3af.pdfIn PDF document text
    • https://cdn.sqhk.co/bobimugura/ibgojaP/dumb_ways_to_die_2_download.pdfIn PDF document text
    • https://site-1175494.mozfiles.com/files/1175494/dozubupun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465025/normal_5fa429950e6c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379848/normal_5fcbee7b1a6e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472495/normal_5fa579527195f.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/jjidFid/fofotuvitenevadafol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459165/normal_5fc4d5680ab94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374175/normal_5fe5f124a84b6.pdfIn PDF document text
    • https://gijamaxo.weebly.com/uploads/1/3/0/7/130740113/6847540.pdfIn PDF document text
    • https://muvanuxeb.weebly.com/uploads/1/3/4/0/134096654/5522177.pdfIn PDF document text
    • https://site-1200115.mozfiles.com/files/1200115/cute_barbie_girl_pic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501794/normal_5ff8683085cbe.pdfIn PDF document text
    • https://sujofunipus.weebly.com/uploads/1/3/4/5/134502209/tifiv_darozasefela.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/luzonapopaze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474989/normal_5fe0d4b3dc968.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ec55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC55 5392 bytes
SHA-256: aa3352481b0d14d39b8cc69b1b5a8f76639c0e5f2b6878e0af4110b13569971b
font_01_sfnt_off0000fe9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9C 11168 bytes
SHA-256: 5ac5263ffa7263914eb3c8288437eb71533510b969cdefa32e88bec1dd4f2096

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