Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab192c1819e405aa…

MALICIOUS

PDF

117.4 KB Created: 2021-05-18 17:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f969d20b9c3b3724156ce2f36d5d5c38 SHA-1: e9b0db1d34f3ef7b1c2901dbaf85800072a914d1 SHA-256: ab192c1819e405aa2f69bba880d1e2718358d7990fe7b86d6f006c52fdc7bfa6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be a lure for downloading a PDF, likely to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/strik?utm_term=a+series+of+unfortunate+events+book+2+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475588/normal_605cb17505a0c.pdfIn PDF document text
    • http://sunigol.22web.org/kegesajejerutomiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413850/normal_5fdd22aa0a01e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500897/normal_601d588e0e0f3.pdfIn PDF document text
    • http://nejufez.22web.org/online_aptitude_test_with_solved_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455399/normal_5ff6342959fa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_605862ad6c325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425238/normal_6039446d5996e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456998/normal_60254d4d07c3e.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
    • http://vifowas.epizy.com/how_can_i_tell_if_a_lawn_mower_spark_plug_is_bad.pdfIn PDF document text
    • http://moxutomib.rf.gd/navy_yard_shuttle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d5c320-9311-4c11-832e-53f56c888f66/zetobutedojufefek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d96d4c2c-8c11-489d-b008-7365b4ad3409/modal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e82d2c1a-687d-4786-a779-abe2d6ba1e63/85038239143.pdfIn PDF document text
    • http://satuwegalenez.epizy.com/ap_9th_class_biology_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea3d54cf-c7d9-4858-a53b-887db06926c3/hague_water_softener_prices.pdfIn PDF document text
    • http://nadalapaxizo.epizy.com/23244612329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af687882-526a-47fe-9b4c-e18cf34c7398/realtek_high_definition_audio_driver_for_windows_10_64_bit_lenovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa3b4c0-52d8-428b-991c-063f427ac0d9/26_mens_schwinn_sidewinder_bike_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8620597-3cd7-4677-a790-06c67e48fc7e/6360075541.pdfIn PDF document text
    • http://tijetefewojo.epizy.com/73453480017.pdfIn 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_off00017ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EF1 5392 bytes
SHA-256: 120f7e70fa453dc7c3d78fce206081d0990309f5c9f72ed098f24d73b15751e6
font_01_sfnt_off00019168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19168 11716 bytes
SHA-256: 6885d383b8587b40f909b5aa71f200e94da717e9c220aab8e512465c7b0fccde
font_02_sfnt_off0001b89e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B89E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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