Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0145aea1840086e…

MALICIOUS

PDF

77.2 KB Created: 2021-03-26 07:56:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a30294bd1ec1342207770e4126953b34 SHA-1: 83bbc4baa32428dc85174f03ad6d15cd154956dd SHA-256: d0145aea1840086e34a51d04664f3c6e553b1c9b364721bd3e5fc2d1a75a3415
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary URL pointing to 'jumiwimov.ru'. This, combined with a heuristic firing for a 'PDF_SEO_LINK_FARM', suggests the document is designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=sierra+comfort+massage+table+bag
    • https://static.s123-cdn-static.com/uploads/4413968/normal_5ffcd0a478f4f.pdf
    • https://cdn.sqhk.co/jotepomi/hjLhdib/tojomegigivewateg.pdf
    • https://static.s123-cdn-static.com/uploads/4374542/normal_5ff8fbf2b1f32.pdf
    • https://static.s123-cdn-static.com/uploads/4424024/normal_5ffa94be5dbfd.pdf
    • https://cdn.sqhk.co/daxegajok/GRjaFic/dijidovuvawix.pdf
    • https://cdn.sqhk.co/zolewiko/2DFicjc/61372585740.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/liguwubore/93590040810.pdf
    • https://48e5b1ff-25fb-49a4-826b-3ad3f3a15688.filesusr.com/ugd/0d632a_2c270d172de447409e1d82b87aa22b92.pdf?index=true
    • https://s3.amazonaws.com/xutomoxu/67659555305.pdf
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_0e1464d1f4204859918a7a9a2f007b55.pdf?index=true
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_a36e5143b9a7452a886a3662dbbb8233.pdf?index=true
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_0b954c7988274629a30d02a9c142cea9.pdf?index=true
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_4a71ab21f870468b8252fa512f6735f6.pdf?index=true
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_2e1ce330150540fb96cc208cd8491011.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6b83d73f-5126-48dd-9b89-c74279eb2b85/talking_as_fast_as_i_can_summary.pdf
    • https://a0758896-f8c2-4fc9-8c7e-5c1738e8bc18.filesusr.com/ugd/0ce882_29b88ee53d9c46c8afb288ad0c8be146.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c2bea3b8-94af-46ab-8994-16034608aff2/gifafabosoganaselodax.pdf
    • https://s3.amazonaws.com/tasufagijaremo/87314569594.pdf
    • https://uploads.strikinglycdn.com/files/fad1e91e-62a4-49c4-97d8-241a221befd8/vaxamovezu.pdf
    • https://764dfaed-7091-4b1c-a8ff-ceb5b694923f.filesusr.com/ugd/4bafdb_2e4586a2a00047d7b46ac7d29bd1ae3c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d9942b84-4b01-4dc8-ada7-99cbec0e9e3c/alkaline_food_list_in_hindi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb49.bin
69173a1ccfc0a4bdebf467f62bea05684b958eec65a9d231ba85ebada7e654fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB49 5444 bytes
font_01_sfnt_off0000fdb9.bin
6f650a05428940467c6486452ff06cae4318c18f88b5a952662c52ff344c8a07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB9 11960 bytes

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