Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aa09e83228854d8…

MALICIOUS

PDF

85.2 KB Created: 2021-04-03 06:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4cc2663cdf40f502979bfd1ec779f0fa SHA-1: 9edce35a7bf4b1c8d232cacb6ae33a805e5b7c91 SHA-256: 5aa09e83228854d805fd7b27ba25c82c5ef6881d903f1ad55b6ece988546a560
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 0.9997

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://xajibur.ru/strik?utm_term=origin+of+species+chapter+titles PDF link annotation
    • http://fonajon.22web.org/operations_research_books_for_mba.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/how_to_describe_double_rainbow_loom.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/basic_concept_of_programming_language.pdfIn PDF document text
    • https://cdn.sqhk.co/vexorikodo/hjV2njc/erebus_escape_room_promo_code.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/Yyicihg/autonics_panel_meter.pdfIn PDF document text
    • https://dexejajakoto.weebly.com/uploads/1/3/0/7/130739268/sabin.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/hjifPaA/31509363124.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/buku_agama_islam_kelas_11.pdfIn PDF document text
    • https://cdn.sqhk.co/wivinapamir/aShhhef/add_drop_down_in_excel_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/famagafe/hgFkqje/history_of_south_africa_book.pdfIn PDF document text
    • http://nikupajosokob.22web.org/gitexerugelakumava.pdfIn PDF document text
    • https://latezuletarok.weebly.com/uploads/1/3/5/2/135298634/vukazo-funemukugu-fawuwarukomozo-bater.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/bc57227d-a4f0-44f4-89f9-729471ea9fc2/distech_controls_thermostat.pdfIn PDF document text
    • http://ligesetuvijaga.epizy.com/36638548512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5ca7502-bfa4-493d-a765-99c92c1ee085/69194068783.pdfIn PDF document text
    • http://wepegiw.epizy.com/why_does_my_tv_say_no_signal_when_hdmi_is_plugged_in_samsung.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75794bb0-0842-4961-bd0a-72f8fcb02c3e/what_is_article_news.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e7d553d-1e4d-429a-8461-030ff6bedd15/gomomasipugajimawage.pdfIn PDF document text
    • http://soveralenox.epizy.com/nujarajiditenewogewuvowup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c4c8a54-2673-4f03-b22c-8cb6b32587a1/spqr_a_history_of_ancient_rome_hardback.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_off00010e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E82 5304 bytes
SHA-256: eeea479f9586cf6e7db3d1080c99c3b2c3288f503258b54cdbc0250550e9e73a
font_01_sfnt_off00012092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12092 11800 bytes
SHA-256: b766ec572f5a23490dbd24254626f0aea19afb3c0f6817f182928621e90cf813

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