Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af9d11d0ddb48e3…

MALICIOUS

PDF

85.7 KB Created: 2021-05-09 04:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7d297e9f1ac0a96492804ed954691768 SHA-1: 8f9f508870aefe8ab0ba1edfe905fec8780127de SHA-256: 2af9d11d0ddb48e337994dd464d06e021d9f40a896b0c16c217ebd88cdffb544
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary malicious URL identified. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to 'Planet X' and 'arrival', aligning with the malicious URL's UTM parameter.

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://jumiwimov.ru/strik?utm_term=planet+x+the+2017+arrival PDF link annotation
    • http://lowabunuzoxa.getenjoyment.net/how_to_put_bobbin_in_singer_talent.pdfIn PDF document text
    • http://bujaxodu.iblogger.org/spoken_english_book_in_gujarati_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387817/normal_5fe0312c3cb93.pdfIn PDF document text
    • https://cdn.sqhk.co/vidujubotaf/URihFgE/tejuneropeliraruka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488139/normal_5ffaf2cbe5a3a.pdfIn PDF document text
    • http://gaximivotekole.mypressonline.com/66410184126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530429/normal_5fd6487883f77.pdfIn PDF document text
    • https://cdn.sqhk.co/mesojofu/3jihgdP/shear_and_bending_moment.pdfIn PDF document text
    • http://zinekob.66ghz.com/aambala_songs_wapwon.pdfIn PDF document text
    • http://fewutame.getenjoyment.net/bessel_formula_for_interpolation.pdfIn PDF document text
    • http://mevakimuvu.mypressonline.com/cervelet_anatomie.pdfIn PDF document text
    • https://cdn.sqhk.co/rukokota/ieaG9tr/5905865217.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwilud.epizy.com/pejomojadapana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/196c9a2a-5309-4a3a-ad80-6afd8453e07f/90_minutes_in_heaven_movie_synopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e73ca8d-184d-4745-a8a9-652ef4ed0775/lokige.pdfIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_e13e83c4f26d4c7fb6be09847e46512f.pdf?index=trueIn PDF document text
    • http://gexegufikide.epizy.com/witok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2767929-e824-43ad-bed7-1372e2a0059a/4355780807.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_dd871d5a5a2641e8886fdcecccc642f5.pdf?index=trueIn PDF document text
    • https://33da92c3-26de-4f6b-bf12-1693cb6a6e79.filesusr.com/ugd/0307f2_988c5393ff4c4251a440978c9004e82a.pdf?index=trueIn PDF document text
    • https://712e085e-8422-4094-ae2e-709d430f1fc9.filesusr.com/ugd/bf8edb_ed3ea1516cb14dc7b4309592cdf433d5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/490473de-fc61-4c9f-b2b8-34f017239c96/53968382405.pdfIn PDF document text
    • http://lajopagi.rf.gd/st_louis_cardinals_schedule_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ade8e4-b99a-43b6-a032-ad267c0a026b/xafaf.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000ff71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF71 6812 bytes
SHA-256: 705a40f2f1299da93398ac562f39fb8e280a7b0d058145836d6dafd55d8ad212
font_01_sfnt_off000110a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A4 5132 bytes
SHA-256: 2fab15df0dd22a7862fb09cd145c0dfaec3486603ef25d96a48bf94fd1377029
font_02_sfnt_off00012224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12224 10880 bytes
SHA-256: 5c4fa6f7bf4e0eab14268f28b226bde7cd9a525ce67d2e43b27e26e7100a7d1e