Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b4831f919bc921…

MALICIOUS

PDF

76.1 KB Created: 2021-03-30 05:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f62d44b5de37e31966f521f849840eb3 SHA-1: d1a48a44e9e452f9183703d943f9cc1cf4343600 SHA-256: e8b4831f919bc92125c91390c377e15e8e259d7aea9134c606ab5b907037eb0a
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 0.9993

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://jumiwimov.ru/wix?keyword=euphemism+worksheet+doc PDF link annotation
    • https://gajaxaja.weebly.com/uploads/1/3/2/7/132712369/8dd374fcc28.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/CpTt6ie/27043055383.pdfIn PDF document text
    • http://help-copyrighteamservice.com/how_to_program_a_weight_watchers_scale0q66e.pdfIn PDF document text
    • https://cdn.sqhk.co/zipodumup/ibEKcwc/pokemon_go_shiny_tier_list_april_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/wifilivemij/jajg6pU/36600960418.pdfIn PDF document text
    • http://ninavadilu.22web.org/navipowi.pdfIn PDF document text
    • http://shopwithsale.website/sig_p938_ankle_holster_reviewsg3479.pdfIn PDF document text
    • https://biwezufum.weebly.com/uploads/1/3/4/8/134872286/degiwazemipu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5fe8271530328.pdfIn PDF document text
    • https://fumeseteno.weebly.com/uploads/1/3/1/4/131483149/5574932.pdfIn PDF document text
    • http://filopibat.22web.org/chemical_bonding_a_level_chemistry_notes.pdfIn PDF document text
    • https://sojopukav.weebly.com/uploads/1/3/4/2/134266177/8c6fc49294.pdfIn PDF document text
    • http://jazazopito.22web.org/niginosaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_60111f294256c.pdfIn PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/wulaxozu.pdfIn PDF document text
    • https://fozafilamo.weebly.com/uploads/1/3/4/3/134314768/gosoregivexab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403672/normal_605e0ef610909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414688/normal_604de93faa954.pdfIn PDF document text
    • https://vinofuloro.weebly.com/uploads/1/3/4/8/134850824/6ed073342d.pdfIn PDF document text
    • http://sberpodarok2020.online/tamezenukoliviv0v49k.pdfIn PDF document text
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/64c7352.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477379/normal_5fe5f69b7a793.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vikogen.epizy.com/jilupibavu.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_off0000ec96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC96 5184 bytes
SHA-256: 802fc02eb5d392fc5fd576126c96bc52d4059b92181b465b11ebe9f2d4b6e4c8
font_01_sfnt_off0000fe23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE23 10872 bytes
SHA-256: b0eaf157d2027f49300012acea9721cabe6283f1749d5bc4b8bb496d5ce434d2

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