Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e71b94e3544d29d…

MALICIOUS

PDF

79.9 KB Created: 2021-04-22 16:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: cd506a33ccf24175d98da9af71ca8477 SHA-1: a58677603f0e3dca57904c979257794a536a9a93 SHA-256: 0e71b94e3544d29d23f816454df00411250dad9ef126aeb239540bcf6f29f8cf
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the nature of the link farm suggests it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/strik?utm_term=new+testament+church+meaning PDF link annotation
    • https://cdn.sqhk.co/pimabosi/i08id3o/57940754308.pdfIn PDF document text
    • http://kewotij.mypressonline.com/56604881715.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/tofewugajafuzajuzajutewi.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/j1Ha3ij/samalofunofumifadonijikig.pdfIn PDF document text
    • https://cdn.sqhk.co/muzedikerum/eha46zf/university_physics_volume_3_0th_edition.pdfIn PDF document text
    • https://vewifofuk.weebly.com/uploads/1/3/5/3/135394013/pezenusixatena.pdfIn PDF document text
    • http://xilatotes.sportsontheweb.net/19022641392.pdfIn PDF document text
    • https://merugerizun.weebly.com/uploads/1/3/4/3/134337850/vuzevoz-nenunazaz-fakifivufijofu.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/60877674411.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zegiwewezenaro.myartsonline.com/ralefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e151ad6-380f-4fd3-a4dd-e73bebbfab0d/fundamentals_of_game_design_free.pdfIn PDF document text
    • https://176fe727-baa2-4f6f-8ab0-cddcd97ecb74.filesusr.com/ugd/45df28_db1816c251d442d8bb9c04e61a582162.pdf?index=trueIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_1996c5cfe3e14fb3be2e0159c82c21f8.pdf?index=trueIn PDF document text
    • https://7648721b-06f4-4917-9c2a-921156fbbd07.filesusr.com/ugd/a7266c_b5dbb554a5f84190bf5a28fb4db1b875.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/49cb8517-2dbd-439d-be12-c53411dcd2f1/convert_html_to_excel_using_php.pdfIn PDF document text
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_6847d6f7a0ad4414914b60e85b25f251.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87cc24d2-0ac4-487f-acba-ea1e6496b369/57138128152.pdfIn PDF document text
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_23b24366d71747c8a389a9c33d703c23.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/37c73d47-2ac6-45d6-8c23-01757d920b4b/what_are_the_16_personality_types_quiz.pdfIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_232aa6b76cb24ed7882879d5b68cd2c6.pdf?index=trueIn PDF document text
    • https://37991ae0-d72b-4ccf-bf90-288dedd591e7.filesusr.com/ugd/041b56_8c55665e89d84abbb74da4c705d0062f.pdf?index=trueIn PDF document text
    • https://e46eb8ae-11b5-47af-91b5-79e2db369635.filesusr.com/ugd/f84671_9c6f07ff7d924501a49966da913fb059.pdf?index=trueIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_6e86729e88964e39b79d67d9e6a81b77.pdf?index=trueIn 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_off0000fb2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2B 5244 bytes
SHA-256: 53084c717b33eb95b5c4362cd006e52126bd0eb8d294c080e761cec6fc21a3a7
font_01_sfnt_off00010cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEE 10472 bytes
SHA-256: 229f5d91f1690edb427c8259c45cc225e8da95b007c303ee9ee81a90cf22b53b

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