Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b155f1ad87adf65…

MALICIOUS

PDF

76.1 KB Created: 2021-03-17 17:38:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e51d197c88c71f452cfaa6fd9c629e73 SHA-1: 1e98ca36fa2c0882b5370a79ca8e3d7d0b2bc6aa SHA-256: 9b155f1ad87adf6568858122d6414a9b77b82275bc062d2ed771df1ef02d8786
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one prominent link pointing to 'midufefew.ru', suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains text related to 'Como hacer la paz con dios' and application metadata, which likely serves as a lure. No scripts were extracted, but the presence of multiple external links and the overall detection profile strongly suggest a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/wix?keyword=como+hacer+la+paz+con+dios
    • http://timurberg.ru/suwijigu5wely.pdf
    • http://tramlaweq.online/how_to_clean_and_oil_singer_4423_sewing_machine3j32j.pdf
    • http://feelslike35.com/kidde_kn-coeg-3_false_gas_alarml4nnm.pdf
    • http://geekcods.com/jabebimubef9s41s.pdf
    • http://tramlaweq.online/real_estate_classes_near_me_costnqeet.pdf
    • http://7gusevshop.space/what_to_do_after_active_release_therapyuakrc.pdf
    • http://watercart.ru/minavehjj68.pdf
    • http://blablablacar.online/are_trx_bands_goodqa4vi.pdf
    • http://digitaltoolsfor.xyz/185698655357m9g3.pdf
    • http://tesocoin.online/crosman_1077_magazine_modky8vt.pdf
    • http://liko-sneakers.com/pewdiepie_tuber_simulator_hack_apk_max_level7s6pj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_82deffa3f7a54ed5baa1d3db2834a7f8.pdf?index=true
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_6c238b9f6bfa456a8fb0feaf9c2ecde1.pdf?index=true
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_36fdb029831a408b82a5f784ec9169b9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/26463cd3-aff7-4096-8ecf-b45481ac64ff/89866098269.pdf
    • https://uploads.strikinglycdn.com/files/5e1f6b4c-5793-40c2-92a1-902d731c118f/terapia_cognitivo_conductual_en_nios_con_autismo.pdf
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_11815a3ca74545d681c4eb39717bd12e.pdf?index=true
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_80a0953289c3424b8f7f2c576514c3ee.pdf?index=true
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_f9f08b9746d045ddb8c1bc50e2127a76.pdf?index=true
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_3333bf57a0e440b5b0e81b906c97e80f.pdf?index=true
    • https://6a421494-2577-4416-904f-e17348f56b63.filesusr.com/ugd/85e76a_d1a93e9914b04a518ee9a2f82400f8e4.pdf?index=true
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_30e4827ea2244f7085b96f63b892c5b8.pdf?index=true
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_25fb359ac5de4a4da7d9b2f37d85576a.pdf?index=true
    • 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_off0000eb7a.bin
35a16db0e32b92a216874de7a78b7127cc28307106fbd93460ac60ea55ee2bb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7A 5268 bytes
font_01_sfnt_off0000fd38.bin
e174f6bcc048ebcb6144fff75809b97d59d6c10957ec8fee0338dae25d42d3e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD38 11652 bytes

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