Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bdc001f47fb5512…

MALICIOUS

PDF

77.3 KB Created: 2021-03-19 03:59:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83921cf759e815f4d1e0918adc26e723 SHA-1: 76c44b8fcac9fccf9101f24626331e9b927bd7dd SHA-256: 3bdc001f47fb551280d29d1e337707dc9a8c17437814b398c36e44f4c53ca009
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'zajinet.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, contains text related to wrestling, suggesting a lure to disguise the malicious nature of the file. No scripts were extracted, but the presence of external URIs and the overall detection suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://zajinet.ru/strik?utm_term=what+are+the+basics+of+wrestling
    • https://cdn.sqhk.co/wisaputal/egVjjDo/politics_and_the_english_language_four_questions.pdf
    • http://retapadu.medianewsonline.com/76437586368.pdf
    • https://cdn.sqhk.co/ridasozewe/iegeKia/degomebizizar.pdf
    • http://siluvuxifebul.medianewsonline.com/1595408176.pdf
    • https://cdn.sqhk.co/kedilexele/pzPhbid/spiderman_logo_wallpaper_hd.pdf
    • http://kasaxeko.mypressonline.com/gamofesedoj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/10069769-b755-421d-9fed-42e8d947b3ec/80733315421.pdf
    • https://2ae8fa2d-8b21-4cd7-bd94-b44763fb9b4d.filesusr.com/ugd/8e1ec7_bad151750ad54986b637ef49816ed69f.pdf?index=true
    • https://e590c0d9-b694-44fb-9862-47327b30d8b0.filesusr.com/ugd/89363e_3464ac9fa4294396a08200a2e5978734.pdf?index=true
    • http://sakogabutal.onlinewebshop.net/nutezutesinemuvajo.pdf
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_7738f69d2edf4cbf9e2fd89c6f2fde90.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2a05b9d6-4b2f-4958-bfa6-68ea80c220d1/57253191582.pdf
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_cd965904a02349b59c4c85120ab1adc5.pdf?index=true
    • https://s3.amazonaws.com/penefelomiju/balanced_scorecard_template_for_healthcare.pdf
    • https://uploads.strikinglycdn.com/files/09746b0d-d132-4991-be53-73c891a7d748/mukuv.pdf
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_2d37fc2e60934da98e8dbd5c8ba0880b.pdf?index=true
    • https://s3.amazonaws.com/nemafu/garetumiton.pdf
    • https://uploads.strikinglycdn.com/files/6caa756c-d95b-4f6e-bc22-19dfaa050963/why_is_my_front_loader_washer_not_draining.pdf
    • https://uploads.strikinglycdn.com/files/c8167b42-aae2-45db-80c1-ba0f86617308/how_to_change_drivers_license_to_nj.pdf
    • https://s3.amazonaws.com/migivewuwe/adobe_creative_suite_5._5_for_mac.pdf
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_dbd8f64cd9094e6397b794ec5868c454.pdf?index=true
    • https://s3.amazonaws.com/degisapemifa/branding_guidelines_typography.pdf
    • https://s3.amazonaws.com/sizadagazagaj/nevixezafagezufebisaxo.pdf
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_057871d340824ec9a692d300c12ad375.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_off0000f0ae.bin
c851c4096acc620ea77a5109ddd7352a8ccc1f207486ad6d8f81649b028c3190		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AE 5388 bytes
font_01_sfnt_off0001031a.bin
3bddaf6f05f51bbfddda48ba28aad8ea30256049f691ce37bcc2ea0a3cc2c41d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 10624 bytes

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