Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ce089acad9feff…

MALICIOUS

PDF

72.2 KB Created: 2021-03-08 14:43:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9a7ad95c349e92879a6705bd0bcf7a7b SHA-1: e3941eca58ef02ab35ac30af3ea69866bcddabf7 SHA-256: 64ce089acad9feffc443f0db9f1b06506016c4b09fbc997e14e4bd93141b5b6c
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. The document body, though partially garbled, contains text related to "Ytd for windows xp" and references wkhtmltopdf, suggesting it's a lure. The presence of numerous external URLs, many hosted on disposable domains, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://fokemale.ru/123?utm_term=ytd+for+windows+xp PDF link annotation
    • https://doxezudira.weebly.com/uploads/1/3/0/7/130739714/eed26539a999.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471514/normal_5fc894da87189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462350/normal_6027fa1a7611a.pdfIn PDF document text
    • http://gixodugesu.medianewsonline.com/mario_vargas_llosa_libros_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496216/normal_602952e33acb2.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/sword_art_online_aincrad_-_edio_1_light_novel.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/what_are_the_different_types_of_agile_methodology.pdfIn PDF document text
    • https://baxorumele.weebly.com/uploads/1/3/0/9/130969728/78d4421.pdfIn PDF document text
    • https://gitexapovaje.weebly.com/uploads/1/3/4/4/134464395/fef24d76.pdfIn PDF document text
    • http://nurokojo.mypressonline.com/how_to_count_number_of_words_in_a_column_in_excel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421983/normal_60000263c67d2.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/samsung_tablet_ce0168_specification.pdfIn PDF document text
    • https://nesexabaxurozij.weebly.com/uploads/1/3/4/8/134898102/7718036.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://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_e84f4d47126345e29b93933f85af2e4d.pdf?index=trueIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/el_coronel_no_tiene_quien_le_escriba_para_descargar.pdfIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_fad845b65f5e4ed0be5f40401ca4ddd8.pdf?index=trueIn PDF document text
    • http://nunavaxukozu.onlinewebshop.net/jafazonomujebabifigilosoz.pdfIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_0e501707435a40ffa3f14b2e4efbd45f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c07cd2d5-5f9a-4005-9b11-0535b296facb/20168702358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb197b41-b380-41e3-8e34-be18c082d99a/why_does_heat_burn_skin.pdfIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_007974f436ba448286631356fb00502f.pdf?index=trueIn PDF document text
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_3e543d3459344dd8afd374660392b9e4.pdf?index=trueIn 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_off0000d1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BA 4584 bytes
SHA-256: add533a38f747ef8b5549a4cc4521eaa607f1203c826adac4445cfb188c4f4e8
font_01_sfnt_off0000e165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE165 10768 bytes
SHA-256: 6de59d1226ecb815a6b0e83a5664a1aaf3f316218cf6e81b81d79d17dce18385
font_02_sfnt_off0001057a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378