Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5ad0bffab45f51…

MALICIOUS

PDF

70.8 KB Created: 2021-04-24 10:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 08256746c70878c73832c5cd73579b26 SHA-1: 260c7684a48e5b771550a66fa70c8e932f204aee SHA-256: 8d5ad0bffab45f514c1f93bb173ed1b6bfa222ab409c7971188de24004dd0816
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 0.9998

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://fokemale.ru/strik?utm_term=3+examples+of+heat+transfer+by+radiation PDF link annotation
    • https://figalinob.weebly.com/uploads/1/3/1/8/131871825/9890301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464710/normal_604676b5f230b.pdfIn PDF document text
    • https://kaseloguxov.weebly.com/uploads/1/3/1/4/131406527/rudegoboluredozeko.pdfIn PDF document text
    • https://rexojufupul.weebly.com/uploads/1/3/4/5/134523972/bojiwasuwubofa_wufikebo_beridotefu.pdfIn PDF document text
    • https://zugexegepu.weebly.com/uploads/1/3/4/7/134740595/juvakavosif_turodikata_levut.pdfIn PDF document text
    • http://foxeged.22web.org/zarosinosogevawapem.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugewameru/ffZheau/mandala_glitter_coloring_book_free_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392444/normal_5fc86ccfb75cb.pdfIn PDF document text
    • https://cdn.sqhk.co/tujuvemevo/jeMgjjK/32_smart_tv_at_costco.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374021/normal_5fca24514f915.pdfIn PDF document text
    • http://kumujobu.iblogger.org/43759413488.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402262/normal_5fc710813be1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486987/normal_600296b5c5d0f.pdfIn PDF document text
    • https://cdn.sqhk.co/tobijoge/fdgiIii/51301815528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487194/normal_606c0764983db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406170/normal_606b256d056a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465690/normal_60117c6095534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496391/normal_604841923e24d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381098/normal_5fcab381a9e30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458837/normal_5fdba887774fb.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

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_off0000d7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DA 5660 bytes
SHA-256: aaa5207f842f66ec6c70de38c27abc05af147e3d565ab7d6d12e9b0280db26b2
font_01_sfnt_off0000eaef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEF 10212 bytes
SHA-256: b2bdf26e19275d8873822c38a9fa39457c05434e8b55321c84ffc1cb69a1f390

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