Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5087bf5b31540d6…

MALICIOUS

PDF

156.7 KB Created: 2021-03-04 16:11:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 58bf4b1ee4b7b58a87316e8dec6cd50c SHA-1: be481c70318cd91d8daf05d8469553741debfd29 SHA-256: e5087bf5b31540d6ad8b0a7eb265de7e3197037c612aa68931fe28be1cfc14ad
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution campaign. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a link farm on potentially untrusted hosting. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://xajibur.ru/strik?utm_term=what+speed+do+airbags+deploy+uk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482228/normal_5ff7e08b7234e.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/criminal_defense_attorney_chicago_pro_bono.pdfIn PDF document text
    • https://cdn.sqhk.co/birugafomafo/77PaEmx/51723262419.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/43266846297.pdfIn PDF document text
    • https://cdn.sqhk.co/lemusezilaz/h6wp1xV/daxusezozaxesokafu.pdfIn PDF document text
    • http://favodokoleti.mypressonline.com/white_hot_kiss_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365619/normal_5fee0eae07e67.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/56791793491.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/why_is_my_xfinity_tv_box_blinking_green.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/14224446460.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/dG7dkgd/survival_island_1_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466146/normal_5fc7d15a70dd7.pdfIn PDF document text
    • http://didazema.mypressonline.com/what_is_a_landscape_social_studies_work.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/chiJmIs/pmc_property_tax_bill_online.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/ToBr0jf/64551975655.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454426/normal_60028032b85fa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e0d0d66b-edef-412c-ac15-706da2bafe46/why_are_slave_narratives_important.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0ad646-1720-4ef3-be30-53431987b293/73314204361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b11a1b9-f54a-4530-83db-28a1e9fe0c25/alpha_dog_define.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638ed3b5-b744-42ed-a2f2-1e51133cd3cf/sony_rx100_vii_best_video_settings.pdfIn PDF document text
    • http://lojibovel.myartsonline.com/black_and_decker_bread_maker_pizza_dough_with_beer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3906a7b6-f0ea-4a5f-9f7a-bbbf9ca20129/zokonixowironupezozivikes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9adb6d7a-effc-4f60-bfeb-2a8424974677/john_deere_42_inch_snowblower_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a448a57a-22fc-4a2f-9a47-ce5430218ff3/excel_exercises_for_beginners.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F6EA 3988 bytes
SHA-256: 3165d56117627bc91c549efa42ad7ef228f00315af112d75a5b6f80271c21916
font_01_sfnt_off0002052d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2052D 5316 bytes
SHA-256: 70c6c753cde37ab05528f9bf7acf7ccf5cbcead53fc6dda6ebe12c7c37ac0cfd
font_02_sfnt_off00021769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21769 12532 bytes
SHA-256: aa13b068291e9eb5a4219074d70fb24d7439f25dd6a1c262c8b73b0908055db6
font_03_sfnt_off00024131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24131 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90
font_04_sfnt_off000255c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x255C8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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