Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1907de21520a51…

MALICIOUS

PDF

74.5 KB Created: 2021-04-25 23:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 23b55631e2dea6edf051229769839d2b SHA-1: 1ab39c06429632c6431e45cc8be71a1cd8f399a0 SHA-256: 8e1907de21520a51b6ea8de585b6e4f88913a60fe55e4841058501772605341f
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 0.9996

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://maypoin.ru/strik?utm_term=la+biblia+hablada+mateo+17 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369654/normal_60607c2a275da.pdfIn PDF document text
    • http://lebepufu.mypressonline.com/89198156517.pdfIn PDF document text
    • http://reduslim-ordina.site/rca_viking_pro_tablet_reset_buttonwuvg1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379038/normal_5fc5a4452d7df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_602c5879e1eac.pdfIn PDF document text
    • http://hookup750.website/proform_tour_de_france_clc_indoor_exercise_bike_manualtyw08.pdfIn PDF document text
    • http://tigibisolefora.mygamesonline.org/applied_mathematics_optimization.pdfIn PDF document text
    • http://kersita.fun/resource_map_the_islandsgllt.pdfIn PDF document text
    • https://cdn.sqhk.co/dawolesirip/IjfguVK/sawukusax.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/jjeWjiL/zejawarawoveziwejane.pdfIn PDF document text
    • http://copyrightnotice-ig.com/83540876423ccfud.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/g4Y5v3k/history_of_cancer_icd_9_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374185/normal_5ffe456d9a937.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/c36342a5-e609-4a64-baae-2bbed45f7995/32191834746.pdfIn PDF document text
    • https://77cbb24c-feae-490b-854c-0a9d4db21a85.filesusr.com/ugd/3752ea_7c5de76ab15b442290daff9d850fd51f.pdf?index=trueIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_0426b53223cc4fec805605dff81096e9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e6227fc-7099-4455-a19a-b47055adbba5/fuxarepobax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8b9eae-c15e-4e2a-94fd-22a0afca1755/wegiza.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_46b482d342284e5aab3d895ced3b6e75.pdf?index=trueIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_5fbf10d110cb49c5a4ba80fba60d9a04.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/73bfa992-8d94-4a5e-a9e8-420d15a5f787/jewish_prayers_for_all_occasions.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BF 5004 bytes
SHA-256: 3daf09e41a27c87e44c249689d49d92173c7d4d06325609fc4d8c3ce19ee0ca0
font_01_sfnt_off0000f2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A7 12644 bytes
SHA-256: 81d1c70a4e46643d4738b9fcdcb1a402ba9f16136c58e1938c7b5227ea1b6e53

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