Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dcf5202aa3c313e…

MALICIOUS

PDF

66.6 KB Created: 2021-03-12 19:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 53b646ec30a05f2d95bac5bc16e7eb08 SHA-1: 531afb389142e41deb5eca22549a64dbf8d23d6c SHA-256: 9dcf5202aa3c313e22c49224684f8777dd7657df4dd4b3821d6b19da259da354
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 0.9998

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://dafemum.ru/aws?utm_term=divina+comedia+humana PDF link annotation
    • http://rawiduti.medianewsonline.com/gexelipabefipepedemika.pdfIn PDF document text
    • https://kinigapiluxuke.weebly.com/uploads/1/3/4/8/134863840/wesotafoge.pdfIn PDF document text
    • https://nukawidizuzaxep.weebly.com/uploads/1/3/3/9/133997642/90efbdc.pdfIn PDF document text
    • https://cdn.sqhk.co/sakupiraf/ejjjbja/vitupiriwasob.pdfIn PDF document text
    • https://tedarotola.weebly.com/uploads/1/3/1/4/131482933/87cd7444a92.pdfIn PDF document text
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/tunexi.pdfIn PDF document text
    • http://tujukesabegakom.mygamesonline.org/81608688941.pdfIn PDF document text
    • https://cdn.sqhk.co/niwexifa/idgd1jj/receita_de_glace_de_bolo_de_aniversario.pdfIn PDF document text
    • https://cdn.sqhk.co/nupijazas/jgMYiiC/kejenoluxonaroxejukawo.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/fhaicII/brutal_fighter_gods_of_war_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/OijNhfv/xivajurapabomumaleju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_7aa36e87d08a4ab38991df1b2e4bbcba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/77d065c9-b969-46dc-b0cf-0dc54e6689d3/peop_model_occupational_therapy_aota.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/full_movie_video_player_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66262f62-7613-4e48-8702-52ee4f80950b/what_to_write_in_my_performance_appraisal_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/koful.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df0eff2-4f94-4248-a691-e1686d425a6c/60288416998.pdfIn PDF document text
    • https://8d90b851-447f-4cfc-ac95-1e867b71b983.filesusr.com/ugd/b371d9_6ef031ba7c154742b7e0ed6073d03dba.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 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_off0000cb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB85 4932 bytes
SHA-256: 08d67f9fd923f42604b6336301419ae7a36e0e371764cb9bdf2dbe41dc83b370
font_01_sfnt_off0000dc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC33 9724 bytes
SHA-256: f10e7ae6333b24a578e06441a7e4e1dec2c6ddeb0e67c7573e8d90f96fe0fd7a

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