Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30e8c348a7939c6…

MALICIOUS

PDF

80.4 KB Created: 2021-04-29 08:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 692339c3c95723ff6bfa30ec79c86de0 SHA-1: 79d1239a0e99349b598706bdb6949caae9abbb59 SHA-256: d30e8c348a7939c687022abc0b4fab5e129a64db42e21e7db535a091e73de8f7
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URI pointing to a URL that mimics job search results, likely to trick the user into clicking it. The document body, though heavily obfuscated, contains text related to job searching, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://zajinet.ru/strik?utm_term=entry+level+mechanical+engineering+jobs+houston
    • http://birjand.design/1993_4runner_generationsj4mp3.pdf
    • http://nefozufovi.scienceontheweb.net/associao_de_resistores_em_srie_paralelo_e_misto.pdf
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/9228049.pdf
    • https://fekazivijiwawad.weebly.com/uploads/1/3/4/6/134687088/wutiwesoj.pdf
    • http://losqutoq.online/summer_escape_pool_pump_instructionskkhk8.pdf
    • http://bigmagazin.xyz/zovudusejaru61n7h.pdf
    • http://jorowijedo.mywebcommunity.org/94870867678.pdf
    • https://fomunova.weebly.com/uploads/1/3/4/6/134684458/3403939.pdf
    • https://menanolunum.weebly.com/uploads/1/3/4/7/134754058/72ca27ce4c820b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/15fd6732-1bbd-4387-a30b-31e4761bef8f/what_is_the_economic_interdependence_theory.pdf
    • https://s3.amazonaws.com/tesasubawalozan/ascendas_india_trust_annual_report_2017.pdf
    • https://s3.amazonaws.com/setaxilitozuko/xusuwunizulobike.pdf
    • https://a29d81ee-e589-4368-99bd-4e0be04eb4c0.filesusr.com/ugd/a89e6e_a324bb03b1144cd4b67c7734e5f0d2d0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ff877cb1-beb3-47a0-8622-ff2a02b6c13f/zozikimigodunipa.pdf
    • https://s3.amazonaws.com/davawina/android-_tools-_adb_ubuntu_16._04.pdf
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_709c07e64a9d491f8997f00a6e7c5afa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/925fafe6-b961-470e-9c9d-fec0f96c1add/mofovap.pdf
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_a2d995875f9349eda8e10742352153ee.pdf?index=true
    • https://uploads.strikinglycdn.com/files/db9698a8-1c14-4036-900f-582b60549ca5/what_does_the_left_side_of_the_human_brain_control.pdf
    • https://uploads.strikinglycdn.com/files/2662448c-c5d6-47d9-a26f-ca6d0b102de5/ritakixosipuxarodapa.pdf
    • https://s3.amazonaws.com/vonutavekip/nazogep.pdf
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_bb410ae88bf64faf9e8b69ff4616d69d.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_off0000f8a9.bin
d2f68d02da2d970c90e0989a69f29bf5e5fd912be0e09b48530892621bbe291f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A9 5548 bytes
font_01_sfnt_off00010b71.bin
021762779c17fc76ce00ec587b1cd20aca4e2a265508714de987ea3be6820c6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B71 12204 bytes

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