Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d180893c10a070…

MALICIOUS

PDF

82.5 KB Created: 2021-03-25 01:00:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1124cd88e1631b3c5d5cc2219d4b4ac8 SHA-1: 17e3fa41014200a7680f95a0c7b63dd21572d597 SHA-256: 75d180893c10a07063943b09ba0b1ea4019dda2e97cc664df5dfb765f5f85235
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 critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, suggesting an attempt to redirect users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=factory+reset+first+alert+smoke+and+carbon+monoxide+alarm PDF link annotation
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/dac607490.pdfIn PDF document text
    • http://zuxuvikewi.sportsontheweb.net/kumuzagarunuxopunasojo.pdfIn PDF document text
    • http://kekijojovif.sportsontheweb.net/mivikobuxadaxuvokiv.pdfIn PDF document text
    • https://widajuzuno.weebly.com/uploads/1/3/1/6/131637349/718e2a.pdfIn PDF document text
    • http://fuxanujibiz.mygamesonline.org/islamic_books_in_urdu_free_download_barelvi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vulopekusape.atwebpages.com/focusrite_scarlett_2i2_3rd_gen_price_in_dubai.pdfIn PDF document text
    • https://f730d15c-1921-46d2-b6d4-288333e40990.filesusr.com/ugd/e2c223_db634f08f2894170aae8f396c96f2f34.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a270c48-1b04-42b7-8243-f299a5c341c4/engineering_drawing_board_sizes.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/dafegagut.pdfIn PDF document text
    • http://sabixukavizom.myartsonline.com/hx_stomp_acoustic_patch.pdfIn PDF document text
    • https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_b5a2168a00e64f72afe8eb91b4c4ac8b.pdf?index=trueIn PDF document text
    • http://jirabasojexosud.atwebpages.com/pressure_washer_motor_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99118339-760e-4a9c-a318-11ce22e83b77/giwuvizufe.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/77678926000.pdfIn PDF document text
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_89ed67001c554f728fc1c9871e46a5dd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4278314e-0503-404f-be02-82da83a119df/fallout_4_mod_issues_xbox_one.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCC 5496 bytes
SHA-256: 472175cf795f51f54ba781874190b300f611d73e1f9e268c88007287da4a35fe
font_01_sfnt_off0000ff78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF78 11584 bytes
SHA-256: 528ec8b98056d4729e192a130285567248982152e6eb16747665d1a8d7d52055
font_02_sfnt_off0001274e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274E 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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