Malicious PDF — malware analysis report

Static analysis result for SHA-256 744183d4245f4882…

MALICIOUS

PDF

74.8 KB Created: 2021-03-17 00:07:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 64626d155e6300df155ccc662bb8c35d SHA-1: a5045e858f83f837c87a0ca6bbb7b4e13c3fb707 SHA-256: 744183d4245f488215fa27f4a8cd4c5ab65b51d8583ee44a8e68d5324b6dd86e
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, with one identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were extracted, the presence of external URIs and the heuristic findings suggest the PDF is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=phanteks+enthoo+pro+m+tempered+glass+manual PDF link annotation
    • http://energierecrute-emplois.com/what_is_the_theme_of_the_joy_luck_clubjibex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494430/normal_601dafea3c461.pdfIn PDF document text
    • http://onesmall.space/asrock_g41m-_vs3_r2._0_manuale35kh.pdfIn PDF document text
    • http://fakoxipedobuk.22web.org/89225836594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409110/normal_600a21c06bdd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376101/normal_5ffad2872b4db.pdfIn PDF document text
    • http://vquest.website/bekiwunupubenaxezeniluzubdhf8u.pdfIn PDF document text
    • http://baby-slings.ru/fifty_shades_freed_2018_download_filmywap5a4af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470020/normal_602a8fbe2dcec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450154/normal_6029a08c36f52.pdfIn PDF document text
    • http://nikaold.site/ge_customer_service_numberwjik4.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://s3.amazonaws.com/dewazewokib/25101188540.pdfIn PDF document text
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_924df4e9dd0449c783203fe77c0a1633.pdf?index=trueIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_1ab3aa42f14e4479b580f447298c9e5c.pdf?index=trueIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_cf39a729127c432e9ba6d6db79d2fe83.pdf?index=trueIn PDF document text
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_010599c59d22474891cb5130bd75c64f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/protocol_p_series_helicopter_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/mozilla_firefox_older_version.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/kilenewebalamafer.pdfIn PDF document text
    • http://labukifured.epizy.com/tesusipidefevevoxepevofow.pdfIn PDF document text
    • http://zupupizejegujun.epizy.com/book_report_example_for_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/6684662772.pdfIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_b024867639374e5e83c3ae7e7c94da4b.pdf?index=trueIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_fb80fc9a65a24b20947de7d1b8e090ed.pdf?index=trueIn PDF document text
    • https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_8844674af2cc4634aa6447fb13c2d00d.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_off0000d91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91F 5272 bytes
SHA-256: f9d1affa7db8ab2904dbc4f886bc653f422b7d440ad05574bb69bdc482b33552
font_01_sfnt_off0000ead6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD6 11568 bytes
SHA-256: f3b8902ac4e4c73bdb5277a5d22530bf119aea89dd003a3997e05e0f88e63459
font_02_sfnt_off00010f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F59 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71