Malicious PDF — malware analysis report

Static analysis result for SHA-256 b021ff19dd66a4ce…

MALICIOUS

PDF

75.7 KB Created: 2021-03-23 09:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a11e961e817579eca7bdf2604c9f9b78 SHA-1: 11845dce5eb4629c92d23375eafb1f73d136e0cb SHA-256: b021ff19dd66a4ce1609a33182578fe44f489386a742ae6ef90609873bcec57e
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-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://fokemale.ru/strik?utm_term=how+much+does+a+medicinal+chemist+earn+uk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365613/normal_5ffde216219f2.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/hILXgds/head_tennis_sensor_app.pdfIn PDF document text
    • https://cdn.sqhk.co/balaragu/hiiMfCp/air_flight_control_system.pdfIn PDF document text
    • http://gexafudotifunud.66ghz.com/luworiwudiguminizop.pdfIn PDF document text
    • http://instofficial.online/97424437476x9bot.pdfIn PDF document text
    • https://cdn.sqhk.co/zisubiziwu/jjXhghj/skyblock_map_1._14.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/qwtggic/led_voltage_drop_resistor_calculator.pdfIn PDF document text
    • http://fridgeservice.ru/sans_undertale_megalovania_earrapelmw1x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377931/normal_6020bc05df1ca.pdfIn PDF document text
    • http://wersita.space/lefutikn2fq7.pdfIn PDF document text
    • https://cdn.sqhk.co/luxanimev/Qij9OLm/gopemajasofekadilolazew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500200/normal_601b1953dcee9.pdfIn PDF document text
    • https://cdn.sqhk.co/pirasemofoge/ijahbX2/free_movies_and_tv_shows_unblocked.pdfIn PDF document text
    • http://medgaj.com/retim_ilke_ve_yntemleri_kpss_km_sorular_2017svu1x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412592/normal_6016fa4c9fce6.pdfIn PDF document text
    • http://edevletorg.com/xorewikaberevijemks10r.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/c099be17-2a66-4bb3-b8ad-2ae5c6c6e394/82560624150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d162253-6b02-479c-8809-c0c3b4f0ce48/how_do_you_unlock_a_locked_lg_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/136f4568-fb31-467a-9439-fed9de253251/poem_books_about_life_and_love.pdfIn PDF document text
    • http://xakitum.epizy.com/v_shred_fat_loss_extreme_results.pdfIn PDF document text
    • http://kazowaz.rf.gd/what_are_some_examples_of_transformational_leadership.pdfIn PDF document text
    • http://romipozaxijida.rf.gd/lupus_journal_author_guidelines.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE665 5296 bytes
SHA-256: d938f85e66fb6817ac61e6adac143c552e4afb9a0bf89206b1bad49b8be05828
font_01_sfnt_off0000f847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF847 12204 bytes
SHA-256: 86c09f614019668f651951ea5fae97e2682f844f5a265b7ac71cc90cc13631a1

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