Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f15b67cf7d4879…

MALICIOUS

PDF

78.5 KB Created: 2021-03-09 01:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a7bb34139d7dee6a669bc70a7cb6606a SHA-1: d23a3f14b163e8bf28f728a7759ca4d3438ea48f SHA-256: 72f15b67cf7d48796225c728f78b7eeefb76b130d94048290797956f15a57c31
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and a heuristic identified it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though obfuscated, contains text related to 'Priest leveling guide wowhead classic', suggesting a lure to disguise malicious links.

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://xezojetit.ru/123?utm_term=priest+leveling+guide+wowhead+classic PDF link annotation
    • http://tikewifijub.22web.org/jezudisanupuwoxur.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/jf9TjaU/38503906161.pdfIn PDF document text
    • http://firavowinoza.iblogger.org/how_to_take_screenshot_in_mac_mini_using_windows_keyboard.pdfIn PDF document text
    • http://faxozulakevosos.iblogger.org/power_pressure_cooker_xl_error_codes_e3.pdfIn PDF document text
    • http://sesaxojatox.iblogger.org/vojakav.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/Jahj6if/65572128411.pdfIn PDF document text
    • http://desoneveru.iblogger.org/big_mouth_book_report.pdfIn PDF document text
    • http://zavudonalu.66ghz.com/lotuboxejefitevagobilol.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzitomizaj/hghhhf9/54228903760.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/agen0b8/sifusipomifituw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lesasesodimavun.epizy.com/national_antiretroviral_treatment_guidelines.pdfIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_5b6227f08b3543b3947a66bc50034c42.pdf?index=trueIn PDF document text
    • http://dofukenibe.rf.gd/is_america_the_greatest_country_movie.pdfIn PDF document text
    • http://fopopas.epizy.com/antraste_font_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a8b2c49-918c-46cb-ab2f-6567658d3d16/la_esposa_que_ora_por_su_esposo_dia_25.pdfIn PDF document text
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_5fa983ef099d41fca7851480c0eb8d5c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c4bbfd-95ea-422d-b020-6f04f05f39d7/wisereb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd4e615-2781-45f8-96a6-dd2b594a386d/22532934996.pdfIn PDF document text
    • http://kojajopi.epizy.com/25681866387.pdfIn PDF document text
    • http://kapizepaninufo.epizy.com/wow_vanilla_arms_warrior_leveling_guide.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_off0000f6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A5 5356 bytes
SHA-256: 1cdbe119c68b58056e798c4980a83251e9a2b3755606d86174212606fe83e850
font_01_sfnt_off000108eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EB 10472 bytes
SHA-256: 35ab5933f747409d308a8086b5020783ff191540f1805adf61c7cc00e67d7de3

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