Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00351eb956b70d8…

MALICIOUS

PDF

85.4 KB Created: 2021-03-23 09:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 099b7a564da22d4c99de73c7d28ca29b SHA-1: 570f5d304925e29ca6c5825aceed3d1208af8c31 SHA-256: c00351eb956b70d88f6f7747357d380caee8a10ff3aefc7599b589e894351973
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/wix?keyword=samsung+tv+ln32b360c5dxza+manual PDF link annotation
    • http://dutusejutax.22web.org/bubbleupnp_android_apk.pdfIn PDF document text
    • http://digovin.getenjoyment.net/lujudozupogobino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415045/normal_60331e6b5d855.pdfIn PDF document text
    • http://jufimeja.iblogger.org/42502098470.pdfIn PDF document text
    • http://tozepefaj.iblogger.org/exercice_corrig_amplificateur_oprationnel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393369/normal_5ffddfb2c07c2.pdfIn PDF document text
    • http://nexofozupugasi.mywebcommunity.org/dbt_skills_worksheets_free.pdfIn PDF document text
    • http://lesalufijo.iblogger.org/limiting_adjectives_worksheets_for_grade_3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451945/normal_60090f20494f5.pdfIn PDF document text
    • http://xevuwelepudexo.iblogger.org/38192628363.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f3dc8b3-869c-44c5-82eb-14ae88d57796.filesusr.com/ugd/dc4ca1_39fd7c2d7af7462d846417c7f33ce561.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/90fe4de2-cab3-4a16-991e-b679c0e2e3b5/abb_acs800_dsu_firmware_manual.pdfIn PDF document text
    • http://sulumasofip.epizy.com/make_worksheets_writing.pdfIn PDF document text
    • http://toreminasek.rf.gd/what_are_the_formulas_for_special_right_triangles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be098e47-db4f-4a23-acaf-3ab997fb4ff4/sivixig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e30f8f-d957-4018-b20b-3c71292d4c86/graphing_linear_functions_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93c6a42a-0564-4781-95d6-b671958fbaa5/51907610355.pdfIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_f54f17fef1b349a4a65eefd137d049af.pdf?index=trueIn PDF document text
    • http://timusirekinamiz.rf.gd/lifimuniviregusi.pdfIn PDF document text
    • http://rasujej.rf.gd/anorexia_y_bulimia_trastornos_alimentarios_rosa_maria_raich.pdfIn PDF document text
    • http://limoxukuk.atwebpages.com/gagasuvanawebalev.pdfIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_d5c145ec1f2e43518ca4d58b1f3bd282.pdf?index=trueIn PDF document text
    • http://dilexaluv.epizy.com/affiliate_business_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17709dce-dc2b-405e-9dc7-0942fcefa835/integer_word_problems_6th_grade.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_off00010abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABE 6300 bytes
SHA-256: c1adf9e8b54b375c736fc6904ac3e482b6db013c14aa06e569483725114456eb
font_01_sfnt_off00012027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12027 11112 bytes
SHA-256: 310b78817a492fe9e54efeb9e5273c08d1dd3f64b1d524550388060580470438

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