Malicious PDF — malware analysis report

Static analysis result for SHA-256 8308de94fe15a804…

MALICIOUS

PDF

72.2 KB Created: 2021-02-17 03:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b10acd6c5ed084d98c60864664cf93d9 SHA-1: 8d4052889cd7250b056c44293fcdbdbf99f47c5f SHA-256: 8308de94fe15a804bee0eacc14039174cd8875bea1191f1fccf6b809220c9f9d
186 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 0.9998

Heuristics 6

  • 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.
  • 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://crophysi.ru/123?utm_term=what+are+the+best+vegetarian+sources+of+protein PDF link annotation
    • https://modibidusez.weebly.com/uploads/1/3/4/0/134096811/kabavarupavofi_dukal_puzekiwowuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/gfjaCDA/xfinity_prepaid_internet_customer_service_phone_number.pdfIn PDF document text
    • https://talokawibameze.weebly.com/uploads/1/3/4/0/134000376/guruvago.pdfIn PDF document text
    • http://mantenancie.com/free_wedding_flower_checklist_templategh32b.pdfIn PDF document text
    • http://hayatevesigar.online/vevo_video_songs_freeldzl7.pdfIn PDF document text
    • https://weligolujevis.weebly.com/uploads/1/3/4/7/134748453/ganaxu.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/tafogigupi.pdfIn PDF document text
    • https://lebuwaner.weebly.com/uploads/1/3/4/4/134478239/pogimesapedoxatixol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367297/normal_5feff9d4d54cf.pdfIn PDF document text
    • http://dronextactical.xyz/relic_runner_mtg6gbtg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413975/normal_6021e930d181c.pdfIn PDF document text
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/2035994.pdfIn PDF document text
    • https://wapaberupuz.weebly.com/uploads/1/3/5/3/135397773/2024a9183b43e88.pdfIn PDF document text
    • https://finamiwowekizo.weebly.com/uploads/1/3/2/3/132302732/fomuzanepu-lomimogavafam-masaleke.pdfIn PDF document text
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/5734736.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/moruk.pdfIn PDF document text
    • https://rinavupitaf.weebly.com/uploads/1/3/1/1/131164375/6b171.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_off0000dbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBD 5460 bytes
SHA-256: f20719e6394f1c4786a890e85526c1e6b8ca035c2f1ac4e09ea73b8dfe7ce1e2
font_01_sfnt_off0000ee62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE62 10888 bytes
SHA-256: 4be45b20259bfd75e7838db16b9f861a1d064ac6f4b9cf1dab23de278afc94e8

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