Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2330e0773282365…

MALICIOUS

PDF

70.7 KB Created: 2021-03-08 21:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 462e2d30581fa7fe57080a7dc155ff28 SHA-1: e95c4e7a113cc1b727af40c67deaa78d4e94312d SHA-256: a2330e0773282365e720c2bbc8e240b40572b30f02b637572a2548d024862713
126 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 URIs, with a notable one pointing to 'bologen.ru', suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further support this, indicating the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=taking+sides+clashing+views+in+special+education PDF link annotation
    • https://cdn.sqhk.co/kekumumaxow/ibPggLe/givuxepup.pdfIn PDF document text
    • http://botefin.medianewsonline.com/woodcock_anarchism.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/milk_and_honey_book_all_pages.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/when_the_veil_was_torn_in_the_bible.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385413/normal_60171f05becf2.pdfIn PDF document text
    • https://cdn.sqhk.co/rivojotewez/wCjajdR/adventure_capitalist_gry_online.pdfIn PDF document text
    • http://makebugobiwuka.mypressonline.com/iowa_code_sec_714.2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481509/normal_5fe3e3ce6a0f1.pdfIn PDF document text
    • http://dexuposi.sportsontheweb.net/a_first_course_in_graph_theory_solution_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456699/normal_6022d4a3ba150.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/tejelagud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ecc5813-8c8b-45a0-8782-5b2b7dd3a580/sony_rx100_vii_manual_focus.pdfIn PDF document text
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_83fad631c6324018b688b6eea8e9714c.pdf?index=trueIn PDF document text
    • http://wawikoduvebakap.onlinewebshop.net/9040718782.pdfIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_c62c8fb432db4de4980011e3ee4519fe.pdf?index=trueIn PDF document text
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_8a5ba3243173497f8d408fa4233740f1.pdf?index=trueIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_fe163654efed4ebba744cdf47454c2c1.pdf?index=trueIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_45252832de5240939e0dbdf435950142.pdf?index=trueIn PDF document text
    • http://gujimosodaza.myartsonline.com/do_you_have_to_use_distilled_water_for_humidifiers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182f0e2b-a936-481d-997d-7a4b0cbe6420/rafamoberenodilolir.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD712 5404 bytes
SHA-256: 0d250f607c0b5c1431f1089e9018a4d1f81b0878168a4128683134b58388f3d9
font_01_sfnt_off0000e98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98C 10444 bytes
SHA-256: e655749d1b8494afa8e77090d6034dd3376870b8c6c7ae1710de799e623737d3

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