Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be6c746946bf58f…

MALICIOUS

PDF

78.5 KB Created: 2021-05-13 12:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a20aee697f3b45e89c513eb93bf81b0f SHA-1: 56de78d92d370df0551fd4e113a04277304d22f0 SHA-256: 3be6c746946bf58f131f628359e8fe418569e06515c22a935b5eae35a4da71a6
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=how+to+draw+a+cartoon+kid+step+by+step PDF link annotation
    • http://fuxuxixigu.scienceontheweb.net/ikea_catalogue_2020_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/So4xlhc/ravalokotavamanuxawujodin.pdfIn PDF document text
    • http://zutumufedige.getenjoyment.net/atlantic_codex.pdfIn PDF document text
    • http://runojiwum.getenjoyment.net/zumirubujobuvikipi.pdfIn PDF document text
    • http://gibelepij.scienceontheweb.net/managerial_accounting_mcqs_with_answers.pdfIn PDF document text
    • https://lewofadexireg.weebly.com/uploads/1/3/4/8/134868993/a0a6a2b7a9f0ce.pdfIn PDF document text
    • https://cdn.sqhk.co/zimidenex/cn5R9gd/campus_date_sim.pdfIn PDF document text
    • http://fullpisetc.ru/roritugojesovederorz6cvo.pdfIn PDF document text
    • http://winnerslm.space/7582907552im4cq.pdfIn PDF document text
    • https://cdn.sqhk.co/gigatakel/TSchcii/boulangerie_patisserie_paris_11.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/gibulemab.pdfIn PDF document text
    • http://blockingscenery.com/kitisu334de.pdfIn PDF document text
    • http://jotafitosixa.getenjoyment.net/78788133494.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/qjeTxx1/revow.pdfIn PDF document text
    • http://sutobep.getenjoyment.net/34317718276.pdfIn PDF document text
    • http://xonejalevesezom.sportsontheweb.net/43753627242.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/5482874.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/ghgdTha/free_ringtones_for_android_phone_ringing.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b89bfd8-152e-41d0-8539-f059ee539435/23173265975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81632cb8-f5de-4c3e-8717-eb8642458db1/malobumajefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c43bb5b2-bf1d-4531-8c75-079a8d7e2cc6/how_to_get_history_of_commands_in_command_prompt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a7da6ea-3b58-4012-a357-bd526a2cbb84/77752901685.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_off0000f586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF586 5396 bytes
SHA-256: 1a38d01345bff378774e859466b365ea82c77c18eb634463d2b69749261b042a
font_01_sfnt_off000107fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FD 10556 bytes
SHA-256: d4e4d242ec4a6a61f96e8c2bcd439801be0d6f06eb163c1d02c78aa0b0328551

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