Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d699a45a20e4c70…

MALICIOUS

PDF

71.9 KB Created: 2021-03-13 22:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ccd59d2c2d45caa9c6422f408dd3d9af SHA-1: 26b028c0c555e7dff69f8e5015be5f43a844bb14 SHA-256: 5d699a45a20e4c701f44b9877ad4fa204f86a3cdcc7dc1e01c4ec35cfe133de4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to a compromised site for further exploitation or credential harvesting.

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 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.
  • 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://pelibifir.ru/wb?keyword=where%20do%20you%20buy%20transmission%20fluid PDF link annotation
    • https://lekodapodigix.weebly.com/uploads/1/3/4/5/134500142/5510527.pdfIn PDF document text
    • https://wilegefozuf.weebly.com/uploads/1/3/4/3/134399327/vavesulesu-jajerog.pdfIn PDF document text
    • https://fabexitib.weebly.com/uploads/1/3/4/1/134109013/kivibovi_mexazijakusiwir_susuto_dubuxerazov.pdfIn PDF document text
    • https://cdn.sqhk.co/tavanaru/jdhfUWS/laundry_service_dirty_clothes_washing_game.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/gOriizT/nexapavopogomuvavazevox.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://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_822cd9767cce4cd690785445c7b6bdaa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/dupewexutafi.pdfIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_48edabf84b2c46678f891e0fc4debdfe.pdf?index=trueIn PDF document text
    • http://gisunomadipoxas.epizy.com/13620867661.pdfIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_eea11c3660bc49658f3b3528289d3e30.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mudurixo/rafedaxisekozalinagox.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/baxot.pdfIn PDF document text
    • http://padubarejibuso.rf.gd/global_building_information_modelling_market.pdfIn PDF document text
    • http://ligirewela.epizy.com/54025363563.pdfIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_9ed7058976b541ccadb5eddaeb9e6c48.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_1498b3013a564d34bb60422843ccb716.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ragejufa/15450818083.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/pizesanirado.pdfIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_6512e8d4581046578aa22e602a5e91ac.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_off0000d055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD055 5284 bytes
SHA-256: ef35182d79d57099e7accaf5d9d8acda4641cc18adad0f0271c1efca657cd284
font_01_sfnt_off0000e225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE225 9916 bytes
SHA-256: 967a1d45ed164e33d9e79aa5018569c45d06bc1598726f690a6255be355983a2
font_02_sfnt_off00010431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10431 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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