Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c29f729dfbe0a8…

MALICIOUS

PDF

80.5 KB Created: 2021-05-17 02:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 244c373b8bf513a68176e6baf543e637 SHA-1: 1a1dbcb68a6aa8c915fbf7116c8eba3eb716ff3b SHA-256: 10c29f729dfbe0a890aa64236375d6a5e5539a0f8087507f731f05aa5bf98ff3
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 0.9996

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://zajinet.ru/strik?utm_term=novation+launchkey+49+specifications PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448731/normal_5fd379ad4a052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416494/normal_6042c1d23f1b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369519/normal_5ff00bce33038.pdfIn PDF document text
    • https://cdn.sqhk.co/suxepemup/Kiijj77/bluestacks_apk_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/jaMgeha/zixevi.pdfIn PDF document text
    • https://mejidoxele.weebly.com/uploads/1/3/4/3/134320803/xoretesomate_nunorix.pdfIn PDF document text
    • https://cdn.sqhk.co/wukiratuxazo/mlgjSKk/free_tiktok_followers_likes_and_views.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/beb0cdd6398.pdfIn PDF document text
    • https://zugixipenelir.weebly.com/uploads/1/3/4/5/134591811/1776145.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/hagfahf/dumopuwesanog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414341/normal_605690ac74dda.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoxezoza/xhh5KaR/bugusiworipukorizelawara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474475/normal_5fd6547c8ace5.pdfIn PDF document text
    • https://petominezejoza.weebly.com/uploads/1/3/2/3/132303337/suvizuduwut.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/jozaponi/16491881623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fabd5ac-b504-4cf8-b732-74cbc478c710/small_girl_big_god_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5225390e-53d5-469c-8367-4a1690dd3450/can_samsung_smart_tv_connect_to_wifi.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/surah_al_kahfi_100-_110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c328740f-5c3c-490b-b6d2-a8e2b19f8ba2/45936862989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b85c79-f809-4a82-bfd3-d130e0cfbb07/1463972875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40cdd577-bdec-465a-8708-e0ee2c6db96a/wunokawugusujarulizefimug.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/survival_of_the_fittest_vs_natural_selection.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_off0000f97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97A 5448 bytes
SHA-256: 0512247d514e37f9479451dcf5b95efbb777f642ce39b9ae6f18519cd17b5f1d
font_01_sfnt_off00010c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1E 11284 bytes
SHA-256: f2bb51687c9f8f44dba19a890f57d824f5caef5eb7c29e0777053d7c06e4ce9d

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