Malicious PDF — malware analysis report

Static analysis result for SHA-256 242dc10208d35550…

MALICIOUS

PDF

76.0 KB Created: 2021-06-05 04:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e91034624f4260d8730c920092b81608 SHA-1: 963694f71dbe59342b5f263fdb731aa02ef5595e SHA-256: 242dc10208d35550c1e5a4bd881472ba8d887b69647ef706312d814feb46ed42
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://archism.ru/pbw?utm_term=fahrenheit+to+celsius+conversion+factor+formula PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490534/normal_5fe2f4f302f56.pdfIn PDF document text
    • https://lukejofavum.weebly.com/uploads/1/3/4/4/134455809/41974ca7b71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480393/normal_5fd8255f36089.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494146/normal_5fed44501e453.pdfIn PDF document text
    • https://babixedijifaz.weebly.com/uploads/1/3/5/3/135385025/tulorifef_lafupolavimol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423429/normal_601474ab8b04a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376612/normal_5ff2e09ca9f72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464541/normal_6036c6651c480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392857/normal_606e9f9bef962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414176/normal_606b55ce95bdf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415929/normal_5fdf601ac77d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wikitaxif.pbworks.com/w/file/fetch/144551703/clean_equalizer__bass_booster_pro_apk_download.pdfIn PDF document text
    • http://fodorafirig.pbworks.com/f/45242426740.pdfIn PDF document text
    • http://likanegi.pbworks.com/w/file/fetch/144601593/iso_9001_quality_management_system_ppt.pdfIn PDF document text
    • http://bupataved.pbworks.com/w/file/fetch/144419772/les_alphas_livre_du_maitre.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/vunagamituvipalusakobojox.pdfIn PDF document text
    • http://jebusolole.pbworks.com/f/xaroki.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_off0000ec4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4B 5136 bytes
SHA-256: e877472e0f250242b6288371d27002990c3eeae81e34400c16f2d2f72dd29dfe
font_01_sfnt_off0000fda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA5 10844 bytes
SHA-256: a4cf9f8ff142ad9f1525fc27c2a8f55a9db5ac8608c9605a9e20a6432361a902

Open this report in the interactive analyzer, or submit your own file for analysis.