Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1741b3e1e047ca…

MALICIOUS

PDF

77.1 KB Created: 2021-03-26 04:02:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6e3636938828832b262510fda171d5d4 SHA-1: 54365acdab04bff02aa6e48521ceeb12f24633d0 SHA-256: 0c1741b3e1e047ca0ae5a79ae9ecdca94daaedbe12c12aac36e2ebf84a407610
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 0.9990

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://soxebez.ru/123?utm_term=laser+b1+teacher+book+answers PDF link annotation
    • http://vurejowug.mypressonline.com/76108872270.pdfIn PDF document text
    • http://pikufufunuti.scienceontheweb.net/ejercicios_abdominales_en_casa.pdfIn PDF document text
    • http://wigobike.sportsontheweb.net/50734394596.pdfIn PDF document text
    • http://gutprod.xyz/critical_thinking_questions_and_answers_interviewzmfcs.pdfIn PDF document text
    • http://kogejirupu.getenjoyment.net/debufoda.pdfIn PDF document text
    • http://kapovulup.mywebcommunity.org/healthcare_administration_and_management.pdfIn PDF document text
    • http://mirumumavetifun.mypressonline.com/lulupu.pdfIn PDF document text
    • http://matawobedopikam.mywebcommunity.org/tipos_de_capacitores.pdfIn PDF document text
    • http://constructionhouse.info/vonivawagisuzuvyey0r.pdfIn PDF document text
    • http://sadovik.me/what_are_some_inspirational_sayingsw07un.pdfIn PDF document text
    • http://pifafixejizigu.scienceontheweb.net/certificate_of_residence_form.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/wedeju.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/e896767a-09ff-4eca-919f-af504e6dc9d1/39528999180.pdfIn PDF document text
    • http://magegefopo.atwebpages.com/47362661940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ba7b03f-a125-4157-b39b-6a39c118d110/ipod_shuffle_1st_generation_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3662f80b-6d4a-4439-a803-c261a6e7c92b/how_do_i_clean_my_bissell_proheat_2x.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dde61e9f-1779-4ccb-b57f-fade0e4ab7f1/86739928521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74390d62-1ecc-442a-8a5d-7b0f77c96718/parrot_ck3100_fitted_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4be2e8-c305-49f1-9a9e-c30021430fba/kogibir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c882aac-de0e-4a52-b358-136b8964a8d3/38821940823.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/jusamamebanezul.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/narnia_prince_caspian_song_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a230060-5f52-4d71-ad7c-261c763a4ad7/asm_welding_handbook.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE147 4884 bytes
SHA-256: dd03b1d802045d9770f2c2e73cfe3bbe53e76c9ea04802610cabc8343ee18052
font_01_sfnt_off0000f1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E3 11896 bytes
SHA-256: ac20f2f2f65beb1b0e43f325e9f52f9f948bcdb2651e99c3901235f2183120c2
font_02_sfnt_off0001186f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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