Malicious PDF — malware analysis report

Static analysis result for SHA-256 585092cb9b8b959d…

MALICIOUS

PDF

77.1 KB Created: 2021-04-08 21:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8295fdeaddce7aff2753deceb60b6d32 SHA-1: ad71be108068c55f87cedd5af0fc93eb7fd9d81b SHA-256: 585092cb9b8b959dbb9708720351798ea0626221a351558f68f9c88fafc8777a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is identified as malicious by ClamAV and an ML classifier, and it contains numerous external URLs. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards an attack pattern involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://dugedepap.ru/strik?utm_term=pet+sematary+2019+review+spoilers PDF link annotation
    • http://hugertely.xyz/century_arms_c308_battle_riflecqjdx.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/data_envelopment_analysis_dea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426267/normal_602b77bf3001f.pdfIn PDF document text
    • http://hotita.space/sams_teach_yourself_sql_in_10_minutes_by_ben_forta_free_downloadnvwtz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392668/normal_5fc62cc3bda7c.pdfIn PDF document text
    • http://ogranicbio.space/918182733110keio.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/balawigapibetaxomemen.pdfIn PDF document text
    • http://tidirakozodawon.getenjoyment.net/can_you_install_steering_wheel_controls.pdfIn PDF document text
    • http://italia-doc.fun/45319963550m6skb.pdfIn PDF document text
    • http://covid-19online.site/bargur_weather_reportb7io1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_5fd651ea4a53e.pdfIn PDF document text
    • http://talakam.space/high_school_reading_passagesrti87.pdfIn PDF document text
    • http://vovpomnim.ru/419988252675zl9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_605d8e890c789.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fowimifefezujo.myartsonline.com/list_of_adjectives_and_opposites_in_english.pdfIn PDF document text
    • https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_733e5303076641b7b5059eff590d5155.pdf?index=trueIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_c66d70635d6c4e60bb1a9c19bd4231b8.pdf?index=trueIn 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 7

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 5700 bytes
SHA-256: 6933cc5c7d455b8e4739baef139aaffd3fecd6c17e1ae6dbe7e505e17e00bbad
font_01_sfnt_off0000fff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF7 11100 bytes
SHA-256: 89d79d1dcce9358027cef13ffc4f802b35a7ac8e82e5b5e3ad2bb0a589309589

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